Smith's Bible Dictionary

Hachilah, The Hill a hill apparently situated in a wood in the wilderness or waste land in the neighborhood of Ziph, in Judah, in the fastnesses or passes of which David and his six hundred followers were lurking when the Ziphites informed Saul of his whereabouts. (1 Samuel 23:19) comp. 1 Samuel 23:14 , 1 Samuel 15 , 1 Samuel 18