1 Samuel 26:3-5

And Saul encamped on the hill of Hachilah, which is beside the road on the east of Jeshimon. But David remained in the wilderness. When he saw that Saul came after him into the wilderness, David sent out spies and learned that Saul had indeed come. Then David rose and came to the place where Saul had encamped. And David saw the place where Saul lay, with Abner the son of Ner, the commander of his army. Saul was lying within the encampment, while the army was encamped around him.