Genesis 19:34-38

34The next day the older daughter said to the younger one, “I did it! Last night I went to bed with my father. Let’s give him wine to drink again tonight. Then you go to bed with him so that we’ll be able to preserve our family line through our father.”

35That night they gave their father wine to drink again. Then the younger one went to bed with him. He didn’t know when she came to bed or when she got up.

36So Lot’s two daughters became pregnant by their father.

37The older one gave birth to a son and named him Moab. He is the ancestor of the Moabites of today.

38The younger daughter also gave birth to a son and named him Ben Ammi. He is the ancestor of the Ammonites of today.