1 Samuel 22:1-5

So David left Gath and escaped to the cave of Adullam. Soon his brothers and all his other relatives joined him there. Then others began coming—men who were in trouble or in debt or who were just discontented—until David was the captain of about 400 men. Later David went to Mizpeh in Moab, where he asked the king, “Please allow my father and mother to live here with you until I know what God is going to do for me.” So David’s parents stayed in Moab with the king during the entire time David was living in his stronghold. One day the prophet Gad told David, “Leave the stronghold and return to the land of Judah.” So David went to the forest of Hereth.