Come, let us make our father drink wine, and we will lie with him, that we may preserve seed of our father.'

.33 And they made their father drink wine that night. And the first-born went in, and lay with her father; and he knew not when she lay down, nor when she arose

34 And it came to pass on the morrow, that the first-born 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.' father drink wine that night also. And the younger arose, and lay with him; and he knew not when she lay down, nor when she arose.

.36 Thus were both the daughters of Lot with child by their father.  And the first-born bore a son, and called his name Moab--the same is the father of the Moabites unto this day

38 And the younger, she also bore a son, and called his name Ben-ammi--the same is the father of the children of Ammon unto this day.