Genesis 19:34 in the King James Version
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.
Context
33 They made their father drink wine that night: and the firstborn went in, and lay with her father. He didn’t know when she lay down, nor when she arose.
34 It came to pass on the next day, that the firstborn said to the younger, “Behold, I lay last night with my father. Let’s make him drink wine again tonight. You go in, and lie with him, that we may preserve our father’s family line.”
35 They made their father drink wine that night also. The younger went and lay with him. He didn’t know when she lay down, nor when she got up.