In these verses,

I.David, having praised God himself, calls upon and invites others to praise him likewise, Psa 9:11. Those who believe God is greatly to be praised not only desire to do that work better themselves, but desire that others also may join with them in it and would gladly be instrumental to bring them to it: Sing praises to the Lord who dwelleth in Zion. As the special residence of his glory is in heaven, so the special residence of his grace is in his church, of which Zion was a type. There he meets his people with his promises and graces, and there he expects they should meet him with their praises and services. In all our praises we should have an eye to God as dwelling in Zion, in a special manner present in the assemblies of his people, as their protector and patron. He resolved himself to show forth God's marvellous works (Psa 9:1), and here he calls upon others to declare among the people his doings. He commands his own subjects to do it, for the honour of God, of their country, and of their holy religion; he courts his neighbours to do it, to sing praises, not, as hitherto, to their false gods, but to Jehovah who dwelleth in Zion, to the God of Israel, and to own among the heathen that the Lord has done great things for his people Israel, Psa 126:3, Psa 126:4. Let them particularly take notice of the justice of God in avenging the blood of his people Israel on the Philistines and their other wicked neighbours, who had, in making war upon them, used them barbarously and given them no quarter, Psa 9:12. When God comes to make inquisition for blood by his judgments on earth, before he comes to do it by the judgment of the great day, he remembers them, remembers every drop of the innocent blood which they have shed, and will return it sevenfold upon the head of the blood-thirsty; he will give them blood to drink, for they are worthy. This assurance he might well build upon that word (Deu 32:43), He will avenge the blood of his servants. Note, There is a day coming when God will make inquisition for blood, when he will discover what has been shed secretly, and avenge what has been shed unjustly; see Isa 26:21; Jer 51:35. In that day it will appear how precious the blood of God's people is to him (Psa 72:14), when it must all be accounted for. It will then appear that he has not forgotten the cry of the humble, neither the cry of their blood nor the cry of their prayers, but that both are sealed up among his treasures.

II.David, having praised God for former mercies and deliverances, earnestly prays that God would still appear for him; for he sees not all things put under him.

1.He prays, (1.) That God would be compassionate to him (Psa 9:13): "Have mercy upon me, who, having misery only, and no merit, to speak for me, must depend upon mercy for relief." (2.) That he would be concerned for him. He is not particular in his request, lest he should seem to prescribe to God; but submits himself to the wisdom and will of God in this modest request, "Lord, consider my trouble, and do for me as thou thinkest fit."

2.He pleads, (1.) The malice of his enemies, the trouble which he suffered from those that hated him, and hatred is a cruel passion. (2.) The experience he had had of divine succours and the expectation he now had of the continuance of them, as the necessity of his case required: "O thou that liftest me up, that canst do it, that hast done it, that wilt do it, whose prerogative it is to lift up thy people from the gates of death!" We are never brought so low, so near to death, but God can raise us up. If he has saved us from spiritual and eternal death, we may thence take encouragement to hope that in all our distresses he will be a very present help to us. (3.) His sincere purpose to praise God when his victories should be completed (Psa 9:14): "Lord, save me, not that I may have the comfort and credit of the deliverance, but that thou mayest have the glory, that I may show forth all thy praise, and that publicly, in the gates of the daughter of Zion;" there God was said to dwell (Psa 9:11) and there David would attend him, with joy in God's salvation, typical of the great salvation which was to be wrought out by the Son of David.

III.David by faith foresees and foretels the certain ruin of all wicked people, both in this world and in that to come.

1.In this world, Psa 9:15, Psa 9:16. God executes judgment upon them when the measure of their iniquities is full, and does it, (1.) So as to put shame upon them and make their fall inglorious; for they sink into the pit which they themselves digged (Psa 7:15), they are taken in the net which they themselves laid for the ensnaring of God's people, and they are snared in the work of their own hands. In all the struggles David had with the Philistines they were the aggressors, Sa2 5:17, Sa2 5:22. And other nations were subdued by those ward in which they embroiled themselves. The overruling providence of God frequently so orders it that persecutors and oppressors are brought to ruin by those very projects which they intended to be destructive to the people of God. Drunkards kill themselves; prodigals beggar themselves; the contentious bring mischief upon themselves. Thus men's sins may be read in their punishment, and it becomes visible to all that the destruction of sinners is not only meritoriously, but efficiently, of themselves, which will fill them with the utmost confusion. (2.) So as to get honour to himself: The Lord is known, that is, he makes himself known, by these judgments which he executes. It is known that there is a God who judges in the earth, that he is a righteous God, and one that hates sin and will punish it. In these judgments the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men. The psalmist therefore adds here a note extraordinary, commanding special regard, Higgaion; it is a thing to be carefully observed and meditated upon. What we see of present judgments, and what we believe of the judgment to come, ought to be the subject of our frequent and serious meditations.

2.In the other world (Psa 9:17): The wicked shall be turned into hell, as captives into the prison-house, even all the nations that forget God. Note, (1.) Forgetfulness of God is the cause of all the wickedness of the wicked. (2.) There are nations of those that forget God, multitudes that live without God in the world, many great and many mighty nations, that never regard him nor desire the knowledge of his ways. (3.) Hell will, at last, be the portion of such, a state of everlasting misery and torment - Sheol, a pit of destruction, in which they and all their comforts will be for ever lost and buried. Though there be nations of them, yet they shall be turned into hell, like sheep into the slaughter-house (Psa 49:14), and their being so numerous will not be any security or ease to them, nor any loss to God or the least impeachment of his goodness.

IV.David encourages the people of God to wait for his salvation, though it should be long deferred, Psa 9:18. The needy may think themselves, and others may think them, forgotten for a while, and their expectation of help from God may seem to have perished and to have been for ever frustrated. But he that believes does not make haste; the vision is for an appointed time, and at the end it shall speak. We may build upon it as undoubtedly true that God's people, God's elect, shall not always be forgotten, nor shall they be disappointed of their hopes from the promise. God will not only remember them, at last, but will make it to appear that he never did forget them; it is impossible he should, though a woman may forget her sucking child.

V.He concludes with prayer that God would humble the pride, break the power, and blast the projects, of all the wicked enemies of his church: "Arise, O Lord! (Psa 9:19), stir up thy self, exert thy power, take thy seat, and deal with all these proud and daring enemies of thy name, and cause, and people." 1. "Lord, restrain them, and set bounds to their malice: Let not man prevail; consult thy own honour, and let not weak and mortal men prevail against the kingdom and interest of the almighty and immortal God. Shall mortal man be too hard for God, too strong for his Maker?" 2. "Lord, reckon with them: Let the heathen be judges in thy sight, that is, let them be plainly called to an account for all the dishonour done to thee and the mischief done to thy people." Impenitent sinners will be punished in God's sight; and, when their day of grace is over, the bowels even of infinite mercy will not relent towards them, Rev 14:10. 3. "Lord, frighten them: Put them in fear, O Lord! (Psa 9:20), strike a terror upon them, make them afraid with thy judgments." God knows how to make the strongest and stoutest of men to tremble and to flee when none pursues, and thereby he makes them know and own that they are but men; they are but weak men, unable to stand before the holy God - sinful men, the guilt of whose consciences make them subject to alarms. Note, It is a very desirable thing, much for the glory of God and the peace and welfare of the universe, that men should know and consider themselves to be but men, depending creatures, mutable, mortal, and accountable.

In singing this psalm we must give to God the glory of his justice in pleading his people's cause against his and their enemies, and encourage ourselves to wait for the year of the redeemed and the year of recompences for the controversy of Zion, even the final destruction of all anti-christian powers and factions, to which many of the ancients apply this psalm.

The Lord is known by the judgment which he executeth,.... The judgment which God will execute upon antichrist, and the antichristian powers, will be a means of making known his name, his glory, his perfections, in all the earth; as his wisdom, power, justice, and goodness; see Exo 9:16. The destruction of antichrist will be the Lord's doing, and it will be a righteous one; it will be a just retaliation; as he has killed with the sword, multitudes of his followers shall be killed with the sword; as he has led captive, he shall be taken captive at the battle of Armageddon; as he has burnt, many of the martyrs of Jesus, he shall be cast into the lake of fire burning with brimstone. Some read these words as two sentences, "The Lord is known; he hath executed judgment" (n): the latter of these refers not to the ministration of justice in the providential government of the world, or at the last day in the general judgment; but to the judgment of the great whore, or antichrist, at which time the Lord will be known in his Gospel in all the world; the earth will be tilled with the knowledge of him, and he, and he alone, will be exalted; his name will be great and glorious throughout the earth; all shall know him, from the least to the greatest; and their knowledge of him will be very clear and comprehensive;

the wicked is snared in the work of his own hands; not Goliath, as Kimchi thinks, who was slain by David with his own sword, though this was true of him in the letter and type; but the wicked one, the man of sin and son of perdition, antichrist, whose coming is after the working of Satan, with all craftiness and wily stratagems, called the depths of Satan, Rev 2:24; but his own sins shall take him, and he shall be holden with the cords of his iniquities, and be rewarded double for all his sins; what is before figuratively expressed is here literally declared; or, "he hath snared the wicked in or by the work of his hands" (o), that is, God.

Higgaion. Selah; of the latter of these words; see Gill on Psa 3:2; the former signifies "meditation"; Jarchi paraphrases it "let us meditate on this, selah"; Aben Ezra interprets it, "I will show forth this in truth"; the Chaldee paraphrase is, "the righteous shall rejoice for ever"; the note of Kimchi and Ben Melech is, "this salvation is to us meditation and praise"; upon the whole the sense seems to be this, that God's judgments upon antichrist, and the antichristian states, and the deliverance of his people from their yoke and tyranny, are things worthy of the meditation of the saints, and afford just matter of joy, praise, and thanksgiving.

(n) "notus est Dominus; judicium fecit", Pagninus, Montanus, Gussetius; so Vatablus, Musculus, Cocceius, Gejerus, Michaelis, and Ainsworth. (o) "illaqueavit iniquum per opus (vel in opere) manunm ipsius", Gussetius.

The undesigned results of the devices of the wicked prove them to be of God's overruling or ordering, especially when those results are destructive to the wicked themselves.