Here, I. Moses is instructed. We may well suppose that he, for his part, was much astonished both at Pharaoh's obstinacy and at God's severity, and could not but be compassionately concerned for the desolations of Egypt, and at a loss to conceive what this contest would come to at last. Now here God tells him what he designed, not only Israel's release, but the magnifying of his own name: That thou mayest tell in thy writings, which shall continue to the world's end, what I have wrought in Egypt, Exo 10:1, Exo 10:2. The ten plagues of Egypt must be inflicted, that they may be recorded for the generations to come as undeniable proofs, 1. Of God's overruling power in the kingdom of nature, his dominion over all the creatures, and his authority to use them either as servants to his justice or sufferers by it, according to the counsel of his will. 2. Of God's victorious power over the kingdom of Satan, to restrain the malice and chastise the insolence of his and his church's enemies. These plagues are standing monuments of the greatness of God, the happiness of the church, and the sinfulness of sin, and standing monitors to the children of men in all ages not to provoke the Lord to jealousy nor to strive with their Maker. The benefit of these instructions to the world sufficiently balances the expense.

II.Pharaoh is reproved (Exo 10:3): Thus saith the Lord God of the poor, despised, persecuted, Hebrews, How long wilt thou refuse to humble thyself before me? Note, It is justly expected from the greatest of men that they humble themselves before the great God, and it is at their peril if they refuse to do it. This has more than once been God's quarrel with princes. Belshazzar did not humble his heart, Dan 5:22. Zedekiah humbled not himself before Jeremiah, Ch2 36:12. Those that will not humble themselves God will humble. Pharaoh had sometimes pretended to humble himself, but no account was made of it, because he was neither sincere nor constant in it.

III.The plague of locusts is threatened, Exo 10:4-6. The hail had broken down the fruits of the earth, but these locusts should come and devour them: and not only so, but they should fill their houses, whereas the former inroads of these insects had been confined to their lands. This should be much worse than all the calamities of that king which had ever been known. Moses, when he had delivered his message, not expecting any better answer than he had formerly, turned himself and went out from Pharaoh, Exo 10:6. Thus Christ appointed his disciples to depart from those who would not receive them, and to shake off the dust of their feet for a testimony against them; and ruin is not far off from those who are thus justly abandoned by the Lord's messengers, Sa1 15:27, etc.

IV.Pharaoh's attendants, his ministers of state, or privy-counsellors, interpose, to persuade him to come to some terms with Moses, Exo 10:7. They, as in duty bound, represent to him the deplorable condition of the kingdom (Egypt is destroyed), and advise him by all means to release his prisoners (Let the men go); for Moses, they found, would be a snare to them till it was done, and it were better to consent at first than to be compelled at last. The Israelites had become a burdensome stone to the Egyptians, and now, at length, the princes of Egypt were willing to be rid of them, Zac 12:3. Note, It is a thing to be regretted (and prevented, if possible) that a whole nation should be ruined for the pride and obstinacy of its princes, Salus populi suprema lex - To consult the welfare of the people is the first of laws.

V.A new treaty is, hereupon, set on foot between Pharaoh and Moses, in which Pharaoh consents for the Israelites to go into the wilderness to do sacrifice; but the matter in dispute was who should go, Exo 10:8. 1. Moses insists that they should take their whole families, and all their effects, along with them, Exo 10:9. note, Those that serve God must serve him with all they have. Moses pleads, "We must hold a feast, therefore we must have our families to feast with, and our flocks and herds to feast upon, to the honour of God." 2. Pharaoh will by no means grant this: he will allow the men to go, pretending that this was all they desired, though this matter was never yet mentioned in any of the former treaties; but, for the little ones, he resolves to keep them as hostages, to oblige them to return, Exo 10:10, Exo 10:11. In a great passion he curses them, and threatens that, if they offer to remove their little ones, they will do it at their peril. Note, Satan does all he can to hinder those that serve God themselves from bringing their children in to serve him. He is a sworn enemy to early piety, knowing how destructive it is to the interests of his kingdom; whatever would hinder us from engaging our children to the utmost in God's service, we have reason to suspect the hand of Satan in it. 3. The treaty, hereupon, breaks off abruptly; those that before went out from Pharaoh's presence (Exo 10:6) were now driven out. Those will quickly hear their doom that cannot bear to hear their duty. See Ch2 25:16. Quos Deus destruet eos dementat - Whom God intends to destroy he delivers up to infatuation. Never was man so infatuated to his own ruin as Pharaoh was.

To-morrow will I bring the locusts - The word ארבה arbeh, a locust, is probably from the root רבה rabah, he multiplied, became great, mighty, etc.; because of the immense swarms of these animals by which different countries, especially the east, are infested. The locust, in entomology, belongs to a genus of insects known among naturalists by the term Grylli; and includes three species, crickets, grasshoppers, and those commonly called locusts; and as they multiply faster than any other animal in creation, they are properly entitled to the name ארבה arbeh, which might be translated the numerous or multiplied insect. See this circumstance referred to, Jdg 6:5; Jdg 7:12; Psa 105:34; Jer 46:23; Jer 51:14; Joe 1:6; Nah 3:15; Judith 2:19, 20; where the most numerous armies are compared to the arbeh or locust. The locust has a large open mouth; and in its two jaws it has four incisive teeth, which traverse each other like scissors, being calculated, from their mechanism, to grip or cut. Mr. Volney, in his Travels in Syria, gives a striking account of this most awful scourge of God: -

"Syria partakes together with Egypt and Persia, and almost all the whole middle part of Asia, in the terrible scourge, I mean those clouds of locusts of which travelers have spoken; the quantity of which is incredible to any person who has not himself seen them, the earth being covered by them for several leagues round. The noise they make in browsing the plants and trees may be heard at a distance, like an army plundering in secret. Fire seems to follow their tracks. Wherever their legions march the verdure disappears from the country, like a curtain drawn aside; the trees and plants, despoiled of their leaves, make the hideous appearance of winter instantly succeed to the bright scenes of spring. When these clouds of locusts take their flight, in order to surmount some obstacle, or the more rapidly to cross some desert, one may literally say that the sun is darkened by them."

Baron de Tott gives a similar account: "Clouds of locusts frequently alight on the plains of the Noguais, (the Tartars), and giving preference to their fields of millet, ravage them in an instant. Their approach darkens the horizon, and so enormous is their multitude, it hides the light of the sun. They alight on the fields, and there form a bed of six or seven inches thick. To the noise of their flight succeeds that of their devouring actively, which resembles the rattling of hail-stones; but its consequences are infinitely more destructive. Fire itself eats not so fast; nor is there any appearance of vegetation to be found when they again take their flight, and go elsewhere to produce new disasters."

Dr. Shaw, who witnessed most formidable swarms of these in Barbary in the years 1724 and 1725, gives the following account of them: "They were much larger than our grasshoppers, and had brown-spotted wings, with legs and bodies of a bright yellow. Their first appearance was towards the latter end of March. In the middle of April their numerous swarms, like a succession of clouds, darkened the sun. In the month of May they retired to the adjacent plains to deposit their eggs: these were no sooner hatched in June than the young brood first produced, while in their caterpillar or worm-like state, formed themselves into a compact body of more than a furlong square, and, marching directly forward, climbed over trees, walls, and houses, devouring every plant in their way. Within a day or two another brood was hatched, and advancing in the same manner, gnawed off the young branches and bark of the trees left by the former, making a complete desolation. The inhabitants, to stop their progress, made a variety of pits and trenches all over their fields and gardens, which they filled with water, or else heaped up therein heath, stubble, etc., which they set on fire; but to no purpose: for the trenches were quickly filled up and the fires extinguished, by infinite swarms succeeding one another; while the front seemed regardless of danger, and the rear pressed on so close that retreat was altogether impossible. In a month's time they threw off their worm-like state; and in a new form, with wings and legs, and additional powers, returned to their former voracity." - Shaw's Travels, 187, 188, 4th edition.

The descriptions given by these travelers show that God's army, described by the Prophet Joel, Joe 2:1-11, was innumerable swarms of locusts, to which the accounts given by Dr. Shaw and others exactly agree.

Else, if thou refuse to let my people go,.... He threatens him with the following plague, the plague of the locusts, which Pliny (x) calls "denrum irae pestis":

behold, tomorrow will I bring the locusts into thy coast; according to Bishop Usher (y) this was about the seventh day of the month Abib, that this plague was threatened, and on the morrow, which was the eighth day, it was brought; but Aben Ezra relates it as an opinion of Japhet an Hebrew writer, that there were many days between the plague of the hail, and the plague of the locusts, that there might be time for the grass and plants to spring out of the field; but this seems not necessary, for these locusts only ate of what were left of the hail, as in the following verse.

(x) Nat. Hist. l. 11. c. 29. (y) Annales Vet. Test. p. 21.

to-morrow will I bring the locusts--Moses was commissioned to renew the request, so often made and denied, with an assurance that an unfavorable answer would be followed on the morrow by an invasion of locusts. This species of insect resembles a large, spotted, red and black, double-winged grasshopper, about three inches or less in length, with the two hind legs working like hinged springs of immense strength and elasticity. Perhaps no more terrible scourge was ever brought on a land than those voracious insects, which fly in such countless numbers as to darken the land which they infest; and on whatever place they alight, they convert it into a waste and barren desert, stripping the ground of its verdure, the trees of their leaves and bark, and producing in a few hours a degree of desolation which it requires the lapse of years to repair.