Genesis 19:36-38

Darby Translation

³⁶ And both the daughters of Lot were with child by their father.

³⁷ And the first-born bore a son, and called his name Moab: the same is the father of the Moabites to this day.

³⁸ And the younger, she also bore a son, and called his name Ben-ammi; the same is the father of the children of Ammon to this day.