1 Samuel 24:1-3

After Saul returned from pursuing the Philistines, he was told, “David is in the Desert of En Gedi.” So Saul took three thousand able young men from all Israel and set out to look for David and his men near the Crags of the Wild Goats. He came to the sheep pens along the way; a cave was there, and Saul went in to relieve himself. David and his men were far back in the cave.