1 Samuel 26:3-5

Saul made his camp beside the road on the hill of Hakilah facing Jeshimon, but David stayed in the wilderness. When he saw that Saul had followed him there, he sent out scouts and learned that Saul had definitely arrived. Then David set out and went to the place where Saul had camped. He saw where Saul and Abner son of Ner, the commander of the army, had lain down. Saul was lying inside the camp, with the army encamped around him.