Genesis 19:35-38

King James Version

³⁵ And they made their father drink wine that night also: and the younger arose, and lay with him; and he perceived not when she lay down, nor when she arose.

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

³⁷ And the first born 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 Benammi: the same is the father of the children of Ammon unto this day.