1 Samuel 30:9-10

Having obtained this favourable answer, David starts in pursuit with his old band of 600 men. So rapid was his march that one third of these dropped out of the ranks, so that the newcomers from Manasseh would have been useless, nor had they lost wives or children. The brook (or rather "torrent") Besor practically remains unidentified, as the site of Ziklag is unknown; but possibly it is the Wady-es-Sheriah, which runs into the sea a little to the south of Gaza. As there was water here, those that were left behind stayed. Hebrew, "the stragglers stayed." It seems also to have been wide enough to cause some difficulty in crossing, as it is said that these 200 were too faint, or tired, to go over the torrent Besor . From verse 24 we find that David also left with them as much as possible of his baggage. Stragglers had no doubt been falling out for some time, but would here be rallied, and obtain rest and refreshment.