Jamieson, Fausset and Brown on 1 Samuel 24:3

3. he came to the sheepcotes--most probably in the upper ridge of Wady Chareitun. There a large cave--I am quite disposed to say the cave--lies hardly five minutes to the east of the village ruin, on the south side of the wady. It is high upon the side of the calcareous rock, and it has undergone no change since David's time. The same narrow natural vaulting at the entrance; the same huge natural chamber in the rock, probably the place where Saul lay down to rest in the heat of the day; the same side vaults, too, where David and his men were concealed. There, accustomed to the obscurity of the cavern, they saw Saul enter, while, blinded by the glare of the light outside, he saw nothing of him whom he so bitterly persecuted.