Reference

Genesis 19:38

And the younger, she also bare a son, and called his name Ben–ammi: the same is the father of the children of Ammon unto this day.
36

Thus were both the daughters of Lot with child by their father.

37

And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day.

38

And the younger, she also bare a son, and called his name Ben–ammi: the same is the father of the children of Ammon unto this day.