Genesis 19:4

19:4 Before they could lie down to sleep, all the men – both young and old, from every part of the city of Sodom – surrounded the house.

Genesis 19:32

19:32 Come, let’s make our father drunk with wine so we can have sexual relations with him and preserve our family line through our father.”

Genesis 19:36

19:36 In this way both of Lot’s daughters became pregnant by their father.