(18) Rephaim.--Translated in Joshua 15:8, the valley of the giants. It was a fruitful valley, stretching some three miles S. and S.W. from Jerusalem, and only separated from the valley of Hinnom by a narrow ridge. It gave ample room for a large encampment, and its situation is an additional proof that the capture of Jerusalem had already been made, since the Philistines came here "to seek David." They had, however, encamped in the same place at earlier times also (see 2Samuel 23:13).

Verse 18. - The valley of Rephaim. This fruitful valley (Isaiah 17:5) is about three miles in length, and two in breadth. Occupying it in vast numbers, the Philistines sent out bodies of men to plunder the whole country, while a sufficient force watched Jerusalem, intending to take it by famine. The Rephaim were an aboriginal race, first mentioned in Genesis 14:5, and evidently in early times very widely spread in Palestine. The idea that they were giants has no more to be said in its favour than that they were ghosts - the meaning of the word in Isaiah 26:14, 19. No sensible philologist will endeavour to explain the names of these primitive races and of their towns by Hebrew roots, though there has been too much of this craze in past times. The Rephaim seem. however, to have been physically a well-developed people, and several races of Canaan of great stature are described in Deuteronomy 2:11 as having belonged to them, as did Og, who was a man of extraordinary dimensions (Deuteronomy 3:11).

5:17-25 The Philistines considered not that David had the presence of God with him, which Saul had forfeited and lost. The kingdom of the Messiah, as soon as it was set up in the world, was thus attacked by the powers of darkness. The heathen raged, and the kings of the earth set themselves to oppose it; but all in vain, Ps 2:1, &c. The destruction will turn, as this did, upon Satan's own kingdom. David owns dependence on God for victory; and refers himself to the good pleasure of God, Wilt thou do it? The assurance God has given us of victory over our spiritual enemies, should encourage us in our spiritual conflicts. David waited till God moved; he stirred then, but not till then. He was trained up in dependence on God and his providence. God performed his promise, and David failed not to improve his advantages. When the kingdom of the Messiah was to be set up, the apostles, who were to beat down the devil's kingdom, must not attempt any thing till they received the promise of the Spirit; who came with a sound from heaven, as of a rushing, mighty wind, Ac 2:2.The Philistines also came and spread themselves in the valley of Rephaim. Or "of the giants", as Joshua 15:8; which lay to the west of Jerusalem; of which; see Gill on Joshua 15:8; the Philistines spreading themselves in it, shows that they were very numerous.