Genesis 19:31-33

New Revised Standard Version, Anglicised Catholic Edition

³¹ And the firstborn said to the younger, ‘Our father is old, and there is not a man on earth to come in to us after the manner of all the world. ³² Come, let us make our father drink wine, and we will lie with him, so that we may preserve offspring through our father.’ ³³ So they made their father drink wine that night; and the firstborn went in, and lay with her father; he did not know when she lay down or when she rose.