II Samuel 9:3, and 6-7

"Then the king said, 'Is there not still someone of the house of Saul, to whom I may show the kindness of God?' And Ziba said to the king, 'There is still a son of Jonathan who is lame in his feet.'"

"Now when Mephibosheth the son of Jonathan, the son of Saul, had come to David, he fell on his face and prostrated himself. Then David said, 'Mephibosheth?' And he answered, 'Here is your servant!'"

"So David said to him, 'Do not fear, for I will surely show you kindness for Jonathan your father's sake, and will restore to you all the land of Saul your grandfather; and you shall eat bread at my table continually.'"