Genesis 19:34-36

World English Bible

³⁴ It came to pass on the next day, that the firstborn said to the younger, “Behold, I lay last night with my father. Let’s make him drink wine again tonight. You go in, and lie with him, that we may preserve our father’s family line.” ³⁵ They made their father drink wine that night also. The younger went and lay with him. He didn’t know when she lay down, nor when she got up. ³⁶ Thus both of Lot’s daughters were with child by their father.