'Fifteen' in the Bible

You and your servants are to farm the land on his behalf and bring in the crops in order to provide for your master's grandson. Meanwhile, Mephibosheth, your master's grandson, will always have a place at my table." (Now Ziba had fifteen sons and 20 servants.)

Ziba, the steward in charge of Saul's household, and 1,000 descendants of Benjamin accompanied him, along with Ziba's fifteen sons and 20 servants. They rushed toward the Jordan River ahead of the king