Genesis 19:27-38

27  And Abraham went early in the morning to the place where he had stood before the Lord.

28  Then he looked toward Sodom and Gomorrah, and toward all the land of the plain; and he saw, and behold, the smoke of the land which went up like the smoke of a furnace.

29  And it came to pass, when God destroyed the cities of the plain, that God remembered Abraham, and sent Lot out of the midst of the overthrow, when He overthrew the cities in which Lot had dwelt.

30  Then Lot went up out of Zoar and dwelt in the mountains, and his two daughters were with him; for he was afraid to dwell in Zoar.  And he and his two daughters dwelt in a cave.

31  Now the firstborn said to the younger, “Our father is old, and there is no man on the earth to come in to us as is the custom of all the earth.

32  “Come, let us make our father drink wine, and we will lie with him, that we may preserve the lineage of or father.”

33  So they made their father drink wine that night.  And the firstborn went in and lay with her father, and he did not know when she lay down or when she arose.

34  It happened on the next day that the first born said to the younger, “Indeed I lay with my father last night; let us make him drink wine tonight also, and you to in the lie with him, that we may preserve the lineage of our father.”

35  Then they made their father drink wine that night also.  And the younger arose and lay with him, and he did not know when she lay down or when she arose.

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

37  The firstborn bore a son and called his name Moab; he is the father of the Moabites of this day.

38  And the younger, she also bore a son and called his name Ben-Ammi; he is the father of the people of Ammon to this day.