1 Samuel 23:13-15

So David and his men, about six hundred in number, left Keilah and kept moving from place to place. When Saul was told that David had escaped from Keilah, he did not go there. David stayed in the wilderness strongholds and in the hills of the Desert of Ziph. Day after day Saul searched for him, but God did not give David into his hands. While David was at Horesh in the Desert of Ziph, he learned that Saul had come out to take his life.