1 Samuel 22:2-4

2 He was joined by all those in difficulties or in debt, or embittered, [1] and became their leader. About four hundred men were with him.

3 From there David went to Mizpeh of Moab and said to the king of Moab, "Let my father and mother stay with you, until I learn what God will do for me."

4 He left them with the king of Moab; they stayed with him as long as David remained in the stronghold. [2]