Genesis 19:35-37

New Century Version

³⁵ So that night they got their father drunk again, and the younger daughter went and had sexual relations with him. Again, Lot did not know when she lay down or when she got up.

³⁶ So both of Lot’s daughters became pregnant by their father. ³⁷ The older daughter gave birth to a son and named him Moab. He is the ancestor of all the Moabite people who are still living today.