Genesis 19:32-34

New Revised Standard Version, Anglicised

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. ³⁴ On the next day, the firstborn said to the younger, ‘Look, I lay last night with my father; let us make him drink wine tonight also; then you go in and lie with him, so that we may preserve offspring through our father.’