37 And the firstborn dealt wickedly, and said unto the younger, Our father has become old, and we have not a man on the earth to come in unto us, to live with us after the manner of all that live on the earth;
38 Therefore come, let us make our father drink wine, and we will lie with him, that we may preserve seed of our father.
39 And they did wickedly, and made their father drink wine that night; and the firstborn went in and lay with her father; and he perceived not when she lay down, nor when she arose.
40 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.
41 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.
42 Thus were both the daughters of Lot with child by their father.
43 And the firstborn bare a son, and called his name Moab; the father of the Moabites, the same which are unto this day.
44 And the younger, she also bare a son, and called his name Ben-ammi; the father of the children which are Ammonites; the same which are unto this day.
Genesis 20
Intro: Abraham goeth to Gerar -- Abraham and Sarah reproved by Abimelech.
1 And Abraham journeyed from thence toward the south country, and dwelt between Kadesh and Shur, and sojourned in Gerar.
2 And Abraham said again of Sarah his wife, She is my sister.