(12) Be of good courage, and let us play the men.—Literally, Be strong and let us strengthen ourselves. The same phrase is translated in Chronicles, “Be of good courage and let us behave ourselves valiantly.” (Compare 1Samuel 4:9.) Joab felt that the battle was a critical one, and on it depended the welfare and even the safety of “our people” and “the cities of our God.” The latter expression is in recognition of the fact that the whole land belonged to God, who allowed the use of it to His people.

The Lord do.—Rather, The Lord will do. Joab’s courage rose here to that highest point which is marked by the full trust that whatever may be the result, it will be that which seems best to Infinite wisdom and love.

2 Samuel 10:12. Be of good courage, &c. — These words, it is likely, were not spoken to Abishai alone, but to all the army by their officers, that they might not be disheartened at the sight of such numerous forces as in a manner encompassed them, but be so much the more resolute for the preservation of their country. And the Lord do that which seemeth him good — If they did their duty, he trusted Divine Providence would favour them. But if not, he would be resigned to God’s will: he would piously leave the issue with him. And when we have done our part, according to the duty of our place, we may, with the greatest satisfaction, leave the event with God; not thinking that our efforts bind him to prosper us, but that he may still do as he pleaseth, and yet hoping for his salvation in his own way and time.

10:6-14 They that are at war with the Son of David, not only give the provocation, but begin the war. God has forces to send against those that set his wrath at defiance, Isa 5:19, which will convince them that none ever hardened his heart against God, and prospered. Christ's soldiers should strengthen one another's hands in their spiritual warfare. Let nothing be wanting in us, whatever the success be. When we make conscience of doing our duty, we may, with satisfaction, leave the event with God, assuredly hoping for his salvation in his own way and time.For the cities of our God - This rather indicates that the relief of Medeba was one of the immediate objects in view, and consequently that at this time Medeba was still in the possession of the Reubenites. To prevent an Israelite city falling into the hands of a pagan people, and the rites of Moloch being substituted for the worship of Yahweh, was a very urgent motive to valor. 2Sa 10:6-14. The Ammonites Overcome.

6-14. when the children of Ammon saw that they stank before David—To chastise those insolent and inhospitable Ammonites, who had violated the common law of nations, David sent a large army under the command of Joab, while they, informed of the impending attack, made energetic preparations to repel it by engaging the services of an immense number of Syrian mercenaries.

Beth-rehob—the capital of the low-lying region between Lebanon and Anti-Lebanon.

Zoba—(see on [271]2Sa 8:3).

of king Maacah—His territories lay on the other side of Jordan, near Gilead (De 3:14).

Ish-tob—that is, "the men of Tob"—the place of Jephthah's marauding adventures (see also 1Ch 19:6; Ps 60:1, title). As the Israelite soldiers poured into the Ammonite territory, that people met them at the frontier town of Medeba (1Ch 19:7-9), the native troops covering the city, while the Syrian mercenaries lay at some distance encamped in the fields. In making the attack, Joab divided his forces into two separate detachments—the one of which, under the command of his brother, Abishai, was to concentrate its attack upon the city, while he himself marched against the overwhelming host of mercenary auxiliaries. It was a just and necessary war that had been forced on Israel, and they could hope for the blessing of God upon their arms. With great judgment the battle opened against the mercenaries, who could not stand against the furious onset of Joab, and not feeling the cause their own, consulted their safety by flight. The Ammonites, who had placed their chief dependence upon a foreign aid, then retreated to entrench themselves within the walls of the town.

For our people; for the preservation of ourselves and all our brethren from that utter ruin which our enemies design for us. Our war is not vainly undertaken to enlarge our empire or glory, but for our own just and necessary defence; and therefore we may hope for God’s blessing and assistance in it.

For the cities of our God; which are devoted to his worship and service, and therefore he will plead their cause against his enemies.

The Lord do that which seemeth him good; let us do our parts, and quietly refer ourselves and the event to God’s good pleasure, which we have no reason to distrust.

Be of good courage, and let us play the men,.... This Joab said, not only to encourage Abishai and himself, but in the hearing of the rest of the officers of the army, and of many of the people, to hearten them to the battle; who might be somewhat intimidated with the number of their enemies, and the position they were in, being before and behind them; and therefore he thought proper to make such a speech to them to animate them to light:

for our people, and for the cities of our God; that the people of Israel might not be carried captive, and their cities spoiled and plundered; and instead of being cities where the people of God dwelt, and he was worshipped, would, if taken, become the habitations of idolatrous Heathens, and where temples would be erected to idols, and the worship of them; these were the arguments he used to engage them to fight manfully for their country, the liberties and religion of it:

and the Lord do that which seemeth him good: tacitly suggesting that victory was of the Lord, and that it became them to do their part in fighting courageously, and leave the issue to the Lord, on whom alone success depended.

Be of good courage, and let us play the men for {e} our people, and for the cities of our God: and the LORD do that which seemeth him good.

(e) Here it is declared why war should be undertaken: for the defence of true religion and God's people.