13 Then David and his men, who were about six hundred, arose and departed out of Keilah, and went wherever they could go. Saul was told that David was escaped from Keilah; and he gave up going there.
1 Samuel 23:13 Cross References - WEB
1 Samuel 22:2
2 Everyone who was in distress, everyone who was in debt, and everyone who was discontented, gathered themselves to him; and he became captain over them. There were with him about four hundred men.
1 Samuel 25:13
13 David said to his men, “Every man put on his sword!” Every man put on his sword. David also put on his sword. About four hundred men followed David, and two hundred stayed by the baggage.
1 Samuel 30:9-10
2 Samuel 15:20
20 Whereas you came but yesterday, should I today make you go up and down with us, since I go where I may? Return, and take back your brothers. Mercy and truth be with you.”