And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him; for he feared to dwell in Zoar: and he dwelt in a cave, he and his two daughters.(Genesis 19:30)

And the firstborn said unto the younger, Our father is old, and there is not a man in the earth to come in unto us after the manner of all the earth:(Genesis 19:31)

Come, let us make our father drink wine, and we will lie with him, that we may preserve seed of our father.(Genesis 19:32)

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.(Genesis 19:34)

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.(Genesis 19:35)

Thus were both the daughters of Lot with child by their father.(Genesis 19:36)