1 Samuel 22:4

They dwelt with him all the while that David was in the hold— David could not bear that his aged parents should be confined to a cold cave, exposed to all the hardships of a siege, to dearth, to damps, and dangers of various kinds; and therefore he commends them to the care of the king of Moab, under whose protection they continued all the time that he was in the hold, or, as some would have it, all the time he continued in a strong hold; during the whole time of his exile, while he was constrained to fly from one strong place to another, to avoid the fury of Saul.