1 Samuel 22:1-4

So David departed from there and escaped to the cave of Adullam; and when his brothers and all his father’s house heard about it, they went down there to him. Everyone who was suffering hardship, and everyone who was in debt, and everyone who was discontented gathered to him; and he became captain over them. There were about four hundred men with him. And David went from there to Mizpah of Moab; and he said to the king of Moab, “Please let my father and my mother come [out of Judah] and stay with you until I know what God will do for me.” Then he left them with the king of Moab; and they stayed with him all the time that David was in the stronghold.