Mwanzo 19 : 38 Genesis chapter 19 verse 38

Na yule mdogo naye akazaa mwana akamwita jina lake Benami; huyo ndiye baba wa Waamoni hata leo.
soma Mlango wa 19

The younger also bore a son, and called his name Ben Ammi. The same is the father of the children of Ammon to this day.