But the king did not give up Mephibosheth, the son of Saul's son Jonathan, because of the Lord's oath made between David and Jonathan, the son of Saul.

And David said, Is there still anyone of Saul's family living, so that I may be a friend to him, because of Jonathan? Now there was of Saul's people a servant named Ziba, and they sent him to David; and the king said to him, Are you Ziba? And he said, I am. And the king said, Is there anyone of Saul's family still living, to whom I may be a friend in God's name? And Ziba said, There is a son of Jonathan, whose feet are damaged. read more.
And the king said to him, Where is he? And Ziba said to the king, He is in the house of Machir, the son of Ammiel, in Lo-debar. Then King David sent, and had him taken from Lo-debar, from the house of Machir, the son of Ammiel. And Mephibosheth, the son of Jonathan, came to David, and falling down on his face, gave him honour. And David said, Mephibosheth. And answering he said, Your servant is here. And David said to him, Have no fear: for truly I will be good to you, because of your father Jonathan, and I will give back to you all the land which was Saul's; and you will have a place at my table at all times.