2 Samuel 9:10-11

10And thou, and thy sons, and thy servants, shall till the land for him, and thou shalt bring in [the fruits], that thy master's son may have food to eat. And Mephibosheth thy master's son shall eat bread at my table continually. Now Ziba had fifteen sons and twenty servants.

11And Ziba said to the king, According to all that my lord the king has commanded his servant, so will thy servant do. And Mephibosheth [said David] shall eat at my table, as one of the king's sons.