these verses of different heroic feats were probably taken from a history of David's wars drawn up in the form of chronicles, and are introduced here as practical proofs of the gracious deliverance of David out of the hand of all his foes, for which he praises the Lord his God in the psalm of thanksgiving which follows, so that the enumeration of these feats is to be regarded as supplying a historical basis for the psalm.
Verses 15-16
The Philistines had war with Israel again. עוד (again) refers generally to earlier wars with the Philistines, and has probably been taken without alteration from the chronicles employed by our author, where the account which follows was attached to notices of other wars. This may be gathered from the books of the Chronicles, where three of the heroic feats mentioned here are attached to the general survey of David's wars (vid., 1Ch 20:4). David was exhausted in this fight, and a Philistian giant thought to slay him; but Abishai came to his help and slew the giant. He was called Yishbo benob (Keri, Yishbi), i.e., not Yishbo at Nob, but Yishbobenob, a proper name, the meaning of which is probably “his dwelling is on the height,” and which may have been given to him because of his inaccessible castle. He was one of the descendants of Raphah, i.e., one of the gigantic race of Rephaim. Raphah was the tribe-father of the Rephaim, an ancient tribe of gigantic stature, of whom only a few families were left even in Moses' time (vid., Deu 2:11; Deu 3:11, Deu 3:13, and the commentary on Gen 14:5). The weight of his lance, i.e., of the metal point to his lance, was three hundred shekels, or eight pounds, of brass, half as much as the spear of Goliath (1Sa 17:7); “and he was girded with new armour.” Böttcher has no doubt given the correct explanation of the word חדשׁה; he supposes the feminine to be used in a collective sense, so that the noun (“armour,” כּליו) could be dispensed with. (For parallels both to the words and facts, vid., Jdg 18:11 and Deu 1:41.) ויּאמר, he said (sc., to himself), i.e., he thought.
Verse 17
The danger into which the king had been brought in this war, and out of which he had been rescued solely by Abishai's timely help, induced his attendants to make him swear that he would not go into battle any more in person. לו נשׁבּע, administered an oath to him, i.e., fixed him by a promise on oath. תכבּה ולא תכבּ, “and shalt not extinguish the light of Israel.” David had
