1 Samuel 22:1-3

So David left Gath and took refuge in the cave of Adullam. When David’s brothers and his father’s whole family heard, they went down and joined him there. In addition, every man who was desperate, in debt, or discontented rallied around him, and he became their leader. About four hundred men were with him. From there David went to Mizpeh of Moab where he said to the king of Moab, “Please let my father and mother stay with you until I know what God will do for me.”