Genesis 19:33-35

New Revised Standard Version Updated Edition

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.” ³⁵ So they made their father drink wine that night also, and the younger rose and lay with him, and he did not know when she lay down or when she rose.