Bereshis 19:31-33

Orthodox Jewish Bible

³¹ And the bechirah said unto the younger, Avinu is old, and there is not an ish in ha’aretz to come in unto us after the derech of kol ha’aretz:

³² Come, let us make avinu drink yayin, and we will lie with him, that we may preserve zera by avinu.

³³ And they made their av drink yayin balailah: and the bechirah went in, and lay with her av; and he had da’as not when she lay down, nor when she arose.