Genesis 19:37 DBY

³⁵  And they gave their father wine to drink that night also. And the younger arose, and lay with him; and he did not know of her lying down, nor of her rising.

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.