1 Samuel 23:18-20
18 Then the two of them made a sacred covenant before the Eternal One. David remained at Horesh, and Jonathan returned to his home.
19 At that time, some of the people of Ziph went to Saul at Gibeah and told him David was hiding in some of the secure places at Horesh, on the hill of Hachilah to the south of Jeshimon.
People of Ziph: 20 Now, O king, come down whenever you desire, and we will do our part by handing him over to you.