(13) Joab the son of Zeruiah.--Zeruiah was David's sister (1Chronicles 2:16), and Joab the most prominent of her three distinguished sons. Subsequently, by his successful leading of the forlorn hope in the siege of Jerusalem (1Chronicles 11:6; comp. 2Samuel 5:8), he became permanently established as commanaer-in-chief of David's army. He was undoubtedly among "the brethren of David" who came down to him at the cave of Adullam (1Samuel 22:1), though he is not mentioned by name, like his brother Abishai (1Samuel 26:6-9), in the narrative of David's outlawry.

The pool of Gibeon is a large reservoir or tank, arranged to store the overflow from a subterranean reservoir fed by a spring in the rocky hill-side. Its ruins still remain, about 120 feet long by 100 broad. The hostile forces halted in full sight of each other on the opposite sides of the pool.

Verse 13. - The pool of Gibson. As Gibeon, which lay about six miles northwest from Jerusalem, was twenty-six miles distant from Hebron, and about the same distance from Mahauaim, it is plain that David knew of Abner's march. Possibly he had been summoned to yield his kingdom up to Ishbosheth as the rightful lord, but, while taking no measures to extend his rule, he felt himself justified in defending his election to be king ever Judah. The pool of Gibeon is described by Robinson ('Researches,' 2:136) as "an open tank about a hundred and twenty feet in length and a hundred in breadth, surrounded by a grove of olive trees. Above it, excavated in the rock, is a subterranean reservoir, to receive the water from a copious spring, from which the overflow descends into the tank below." As neither party was willing to shed the first blood in a civil war, of which the Philistines would reap the benefit, they both halted in sight of one another on opposite sides of the hill, with the tank below them in the middle.

2:8-17. The nation in general refused David. By this the Lord trained up his servant for future honour and usefulness; and the tendency of true godliness was shown in his behaviour while passing through various difficulties. David was herein a type of Christ, whom Israel would not submit to, though anointed of the Father to be a Prince and a Saviour to them. Abner meant, Let the young men fight before us, when he said, Let them play before us: fools thus make a mock at sin. But he is unworthy the name of a man, that can thus trifle with human blood.And Joab the son of Zeruiah,.... A sister of David, and this her son was general of David's army:

and the servants of David, went out; that is, his army went out from Hebron to Gibeon, which was twenty four miles (d) to meet that under Abner; for though he had but one tribe with him, and Ishbosheth had all the rest, yet Judah was a numerous, powerful, and warlike tribe; and besides many out of the other tribes had joined them, and, above all, God was on their side, and they had his promise to rely upon with respect to the establishment of the kingdom in the house of David, and his power and providence to trust in, and therefore went out boldly and cheerfully to meet the armies of Israel under Abner:

and met together by the pool of Gibeon; the same perhaps with the great waters in Gibeon, Jeremiah 41:12,

and they sat down, the one on the one side of the pool, and the other on the other side of the pool; facing one another, and watching each other's motions.

(d) Bunting's Travels, p. 146.