Genesis 19:29-31 New Revised Standard Version (NRSV)
29 So it was that, when God destroyed the cities of the Plain, God remembered Abraham, and sent Lot out of the midst of the overthrow, when he overthrew the cities in which Lot had settled.
The Shameful Origin of Moab and Ammon
30 Now Lot went up out of Zoar and settled in the hills with his two daughters, for he was afraid to stay in Zoar; so he lived in a cave with his two daughters. 31 And the firstborn said to the younger, “Our father is old, and there is not a man on earth to come in to us after the manner of all the world.