3 Then David went to Mizpah in Moab. He petitioned the king of Moab, "Grant asylum to my father and mother until I find out what God has planned for me." 4 David left his parents in the care of the king of Moab. They stayed there all through the time David was hiding out.
Matthew Henry's Commentary on 1 Samuel 22:3-4
Commentary on 1 Samuel 22:1-5
(Read 1 Samuel 22:1-5)
See what weak instruments God sometimes uses, to bring about his own purposes. The Son of David is ready to receive distressed souls, who will be commanded by him. He receives all who come unto Him, however vile and miserable; he changes them into a holy people, and employs them in his service: those who would reign with him must be contented first to suffer with and for him. Observe with what tender concern David provided for his aged parents. The first thing he does is to find them a quiet habitation, whatever became of himself. Let children learn to honour their parents, in every thing consulting their ease and satisfaction. Though highly preferred, and much employed, let them not forget their aged parents. The steps of a good man are ordered by the Lord. And the Lord will preserve his people for their appointed work, however they may be hated and exposed.