Genesis 19:34

Overview - Genesis 19
1	Lot entertains two angels.
4	The vicious Sodomites are smitten with blindness.
12	Lot is warned, and in vain warns his sons-in-law.
15	He is directed to flee with his family to the mountains, but obtains leave to go into Zoar.
24	Sodom and Gomorrah are destroyed.
26	Lot's wife becomes a pillar of salt.
29	Lot dwells in a cave.
31	The incestuous origin of Moab and Ammon.

Genesis 19:34  (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.