1 Samuel 22:2-3

And every one that was in distress, and every one that was in debt, and every one that was discontented, gathered themselves unto him; and he became captain over them: and there were with him about four hundred men. And David went thence to Mizpeh of Moab: and he said unto the king of Moab, Let my father and my mother, I pray thee, come forth, and be with you, till I know what God will do for me.