1 Samuel 26:3
And Saul pitched in the hill of Hachilah, which is before Jeshimon, by the way. But David abode in the wilderness, and he saw that Saul came after him into the wilderness. And Saul pitched in the hill of Hachilah, which is before Jeshimon, by the way. But David abode in the wilderness, and he saw that Saul came after him into the wilderness.
The hill of Hachilah encampment belongs to the period when David was himself a fugitive in the wilderness. At that time he was sheltering Abiathar the son of Ahimelech, who had fled to him after Saul slew the priests of the Lord. David took Abiathar under his protection because the same enemy sought both their lives.