God had given David rest from all his enemies that opposed him and made head against him; and he having made a good use of that rest, has now commission given him to make war upon them, and to act offensively for the avenging of Israel's quarrels and the recovery of their rights; for as yet they were not in full possession of that country to which by the promise of God they were entitled.

I.He quite subdued the Philistines, Sa2 8:1. They had attacked him when they thought him weak (Sa2 5:17), and went by the worst then; but, when he found himself strong, he attacked them, and made himself master of their country. They had long been vexatious and oppressive to Israel. Saul got no ground against them; but David completed Israel's deliverance out of their hands, which Samson had begun long before, Jdg 13:5. Metheg-ammah was Gath (the chief and royal city of the Philistines) and the towns belonging to it, among which there was a constant garrison kept by the Philistines on the hill Ammah (Sa2 2:24), which was Metheg, a bridle (so it signifies) or curb upon the people of Israel; this David took out of their hand and used it as a curb upon them. Thus, when the strong man is disarmed, the armour wherein he trusted is taken from him, and used against him, Luk 11:22. And after the long and frequent struggles which the saints have had with the powers of darkness, like Israel with the Philistines, the Son of David shall tread them all under their feet and make the saints more than conquerors.

II.He smote the Moabites, and made them tributaries to Israel, Sa2 8:2. He divided the country into three parts, two of which he destroyed, casting down the strong-holds, and putting all to the sword; the third part he spared, to till the ground and be servants to Israel. Dr. Lightfoot says, "He laid them on the ground and measured them with a cord, who should be slain and who should live;" and this is called meting out the valley of Succoth, Psa 60:6. The Jews say he used this severity with the Moabites because they had slain his parents and brethren, whom he put under the protection of the king of Moab during his exile, Sa1 22:3, Sa1 22:4. He did it in justice, because they had been dangerous enemies to the Israel of God; and in policy, because, if left in their strength, they still would have been so. But observe, Though it was necessary that two-thirds should be cut off, yet the line that was to keep alive, though it was but one, is ordered to be a full line. Be sure to give that length enough; let the line of mercy be stretched to the utmost in favorem vitae - so as to favour life. Acts of indemnity must be construed so as to enlarge the favour. Now Balaam's prophecy was fulfilled, A sceptre shall arise out of Israel, and shall smite the corners of Moab, to the utmost of which the fatal line extended, Num 24:17. The Moabites continued tributaries to Israel till after the death of Ahab, Kg2 3:4, Kg2 3:5. Then they rebelled and were never reduced.

III.He smote the Syrians or Aramites. Of them there were two distinct kingdoms, as we find them spoken of in the title of the 60th Psalm: Aram Naharaim, - Syria of the rivers, whose head city was Damascus (famed for its rivers, Kg2 5:12), and Aram Zobah, which joined to it, but extended to Euphrates. These were the two northern crowns. 1. David began with the Syrians of Zobah, Sa2 8:3, Sa2 8:4. As he went to settle his border at the river Euphrates (for so far the land conveyed by the divine grant to Abraham and his seed did extend, Gen 15:18), the king of Zobah opposed him, being himself possessed of those countries which belonged to Israel; but David routed his forces, and took his chariots and horsemen. The horsemen are here said to be 700, but Ch1 18:4 they are said to be 7000. If they divided their horse by ten in a company, as it is probable they did, the captains and companies were 700, but the horsemen were 7000. David houghed the horses, cut the sinews of their hams, and so lamed them, and made them unserviceable, at least in war, God having forbidden them to multiply horses, Deu 17:16. David reserved only 100 chariots out of 1000 for his own use: for he placed his strength not in chariots nor horses, but in the living God (Psa 20:7), and wrote it from his own observation that a horse is a vain thing for safety, Psa 33:16, Psa 33:17. 2. The Syrians of Damascus coming in to the relief of the king of Zobah fell with him. 22,000 were slain in the field, Sa2 8:5. So that it was easy for David to make himself master of the country, and garrison it for himself, Sa2 8:6. The enemies of God's church, that think to secure themselves, will prove, in the end, to ruin themselves, by their confederacies with each other. Associate yourselves, and you shall be broken in pieces, Isa 8:9.

IV.In all these wars, 1. David was protected: The Lord preserved him whithersoever he went. It seems, he went in person, and, in the cause of God and Israel, jeoparded his own life in the high places of the field; but God covered his head in the day of battle, which he often speaks of, in his psalms, to the glory of God. 2. He was enriched. He took the shields of gold which the servants of Hadadezer had in their custody (Sa2 8:7) and much brass from several cities of Syria (Sa2 8:8), which he was entitled to, not only jure belli - by the uncontrollable right of the longest sword ("Get it, and take it"); but by commission from heaven, and the ancient entail of these countries on the seed of Abraham.

David took Metheg-ammah - This is variously translated. The Vulgate has, Tulit David fraenum tributi, David removed the bondage of the tribute, which the Israelites paid to the Philistines. Some think it means a fortress, city, or strong town; but no such place as Metheg-ammah is known. Probably the Vulgate is nearest the truth. The versions are all different. See the following comparison of the principal passages here collated with the parallel place in 1 Chr: -

2 Samuel 1 Chronicles Sa2 8:1. - David took Metheg-ammah Sa2 8:3. David Ch1 18:1. - David took Gath and her towns. Ch1 18:3. David smote Hadadezer Sa2 8:4. And David took from him smote Hadarezer Ch1 18:4. And David took from him 1000 and 700 horsemen, and 20,000 foot. 1000 chariots, and 7000 horsemen, and 20,000 foot. Sa2 8:6. Then David put garrisons in Syria Sa2 8:8. And Ch1 18:6. Then David put in Syria Ch1 18:8. And from Betah and Berothai cities of Hadadezer. Sa2 8:9. from Tibhath and Chun cities of Hadarezer. Ch1 18:9. When Toi heard that David had smitten When Tou heard that David had smitten Hadadezer Sa2 8:10. Then Toi sent Joram his son Hadarezer Ch1 18:10. He sent Hadoram his son Sa2 8:12-Syria and Moab Sa2 8:13. - Syrians, in the valley Ch1 18:11-Edom and Moab Ch1 18:12. - Edomites, in the valley of salt, 18,000 Sa2 8:17. - Ahimelech - and Seraiah of salt, 18,000 Ch1 18:16. - Abimelech - and Shausha was the scribe. Sa2 10:16. Shobach the captain was scribe. Ch1 19:16. Shophach the captain Sa2 10:17. David passed over Jordan, and came הלאמה Ch1 19:17. David passed over Jordan and came אלהם to Helam. Sa2 10:18. David slew 700 upon them Ch1 19:18. David slew of the Syrians 7000 chariots of the Syrians, and 40,000 horsemen; chariots, and 40,000 footmen; and smote Shobach, etc. and killed Shophach, etc.

And after this it came to pass,.... After David had rest from his enemies for a time, and after the conversation he had had with Nathan about building the house of God, and after the message sent to him from the Lord by that prophet, forbidding him to build, and David's prayer to the Lord upon it, the following events happened; and which are recorded to show that David's rest from his enemies did not last long, and that he had other work to do than to build the house of God:

that David smote the Philistines, and subdued them; these had been long and implacable enemies of Israel; Samson began to weaken them in his days; a war was waged between them and Israel in the times of Samuel and Saul, and the battle sometimes went on one side and sometimes on the other; but now David made an entire conquest of them: before they had used to come into the land of Israel, and there fight with Israel, but now David entered into their land, and took it from them:

and David took Methegammah out of the hands of the Philistines; the name of a province in Palestine, and from the parallel place in Ch1 18:1, it appears to be Gath, and its adjacent towns; but why that was called the bridle of Ammah, or the bridle of a cubit, as it may be rendered, is not easy to say. The conjecture of Kimchi is, that there was a pool or river of water, so Ammah is thought to signify; and Aquila renders it a water course, which passed through the city, having been brought from without it into it, the communication of which from place to place it may be David cut off, by stopping or turning its stream; but interpreters more generally suppose that Gath was built upon an hill called Ammah, see Sa2 2:24; thought to be the same with the Amgaris of Pliny (d) though that is sometimes read Angaris, a mountain he places in Palestine; and that it was called Metheg, a bridle, because being a frontier city, and being very strong and powerful, erected into a kingdom, it was a curb and bridle upon the Israelites; but now David taking it out of their hands, opened his way for the more easy subduing the rest of their country: or the word may be rendered Metheg and her mother, that is, Gath, the metropolis, since that and her daughters, or towns, are said to be taken, Ch1 18:1; and Metheg might be one of them.

(d) Nat. Hist. l. 5. c. 13.