Matthew Poole and continuators on 1 Samuel 22:4

4 And he brought them before the king of Moab , and they dwelt with him all the while that David was in the hold .

Into his Presence that he might see them, and give them leave to dwell in his Dominion.

Either, 1. In Mizpeh of Moab, which was a very strong Hold. But it is apparent, he speaks of some Hold, where his Father and Mother were exposed to fear and danger from Saul; which they were not in the King of Moab's Royal City. Or, 2. In the Cave of Adullam; mentioned above, v. 1. Or, 3. In Holes; the Singular Number being put for the Plural; as is frequent: i. e. As long as David was forc'd to go from Place to Place, and from Hold to Hold, to secure himself: for it concern'd David to secure his Father, and he did doubtless secure him for all that time; and not onely whilest he was in the Hold of Mizpeh, or of Adullam, which was but a little while.