So David went off with his six hundred as far as the Wadi Besor, where those who were to remain behind halted.
while the whole army marched past him. David and Ittai. As all the Cherethites and Pelethites, and the six hundred Gittites who had entered his service from that city, were passing in review before the king,
David also brought up his men with their families, and they dwelt in the towns of Hebron.
Accordingly, David departed with his six hundred soldiers and went over to Achish, son of Maoch, king of Gath.
David continued the pursuit with four hundred, but two hundred were too exhausted to cross the Wadi Besor and remained behind.