Genesis 19:34-36

21st Century King James Version

³⁴ And it came to pass on the morrow that the firstborn said unto the younger, “Behold, I lay yesternight with my father. Let us make him drink wine this night also, and go thou in and lie with him, that we may preserve seed of our father.”

³⁵ And they made their father drink wine that night also. And the younger arose and lay with him; and he perceived not when she lay down, nor when she arose.

³⁶ Thus were both the daughters of Lot with child by their father.