Genesis 19:36-38

BRG Bible

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.