Genesis 19:35 in the King James Version
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.
Context
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.
36 Thus both of Lot’s daughters were with child by their father.