David therefore departed there, and escaped to the cave of Adullam: and when his brothers and all his father's house heard it, they went down there to him.
"The cave of Adullam"  (1 Samuel 22:1).  This place was near the border between Philistia and Judah where the Shephelah meets the rugged mountainous terrain of Judah, an area where there are literally hundreds of caves.  "Adullam is in the valley Elah on the way down to Philistia from Hebron."[2]  Some scholars dispute this; but if this location is correct, "It was about twelve and one half miles south southwest of Bethlehem."[3]