Genesis 19:30–38

³⁰And Lot went up from 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. ³¹And the first-born said to the younger, Our father is old, and there is not a man in the land to come in to us after the manner of all the earth: ³²come, let us give our father wine to drink, and let us lie with him, that we may preserve seed alive of our father. ³³And they gave their father wine to drink that night. And the first-born went in, and lay with her father, and he did not know of her lying down, nor of her rising. ³⁴And it came to pass on the next day that the first-born said to the younger, Lo, I lay last night with my father: let us give him wine to drink to-night also, and go thou in, lie with him, that we may preserve seed alive of our father. ³⁵And they gave their father wine to drink that night also. And the younger arose, and lay with him; and he did not know of her lying down, nor of her rising. ³⁶And both the daughters of Lot were with child by their father. ³⁷And the first-born bore a son, and called his name Moab: the same is the father of the Moabites to this day. ³⁸And the younger, she also bore a son, and called his name Ben-ammi; the same is the father of the children of Ammon to this day.