Genesis 19:32-35
32 Let’s get our father to drink wine and then lie with him and preserve our family line through our father.”
33 That night they got their father to drink wine, and the older daughter went in and lay with him. He was not aware of it when she lay down or when she got up.
34 The next day the older daughter said to the younger, “Last night I lay with my father. Let’s get him to drink wine again tonight, and you go in and lie with him so we can preserve our family line through our father.”
35 So they got their father to drink wine that night also, and the younger daughter went and lay with him. Again he was not aware of it when she lay down or when she got up.