I Samuel 24:1-3

Now it happened, when Saul had returned from following the Philistines, that it was told him, saying, “Take note! David is in the Wilderness of En Gedi.” Then Saul took three thousand chosen men from all Israel, and went to seek David and his men on the Rocks of the Wild Goats. So he came to the sheepfolds by the road, where there was a cave; and Saul went in to attend to his needs. (David and his men were staying in the recesses of the cave.)