Genesis 19, 34-7

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. And the firstborn bare a son, and called his name Moab: the same is the father of the Moabites unto this day. And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
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