2 Samuel 9:9-10

9Then the king called Ziba, Saul's servant, and said to him, I have given to thy master's son all that belonged to Saul and to all his house.

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.