Genesis 38:8

Israeli Authorized Version

And Yhudah said unto Onan, Go in unto thy brother's wife, and marry her, and raise up seed to thy brother.

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And Naomi said, Turn again, my daughters: why will ye go with me? are there yet any more sons in my womb, that they may be your husbands?

Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness.

And the firstborn said unto the younger, Our father is old, and there is not a man in the earth to come in unto us after the manner of all the earth: