1 Samuel 22:1

To the cave of Adullam Which was a strong hold in the tribe of Judah, 1 Chronicles 11:15; Joshua 15:35. This place, fortified by nature, is so fitted for the security of persons in distress, according to Dr. Delaney, that it hath frequently given a refuge from the Turks to the Christians, who fled thither with their families, flocks, and herds. As it was in the tribe of Judah, and David belonged to that tribe, he might, perhaps, flee to it in hopes of finding some friends in those parts. And his brethren, &c ., went down thither to him Either to comfort him, or to secure themselves from the fury of Saul, who, they thought, might probably wreak upon them his hatred to David.