Genesis 38:8

Catholic Public Domain Version

Therefore, Judah said to his son Onan: "Enter to the wife of your brother, and associate with her, so that you may raise offspring to your brother."

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And the elder said to the younger: "Our father is old, and no man remains in the land who can enter to us according to the custom of the whole world.

You shall not uncover the nakedness of your brother's wife; for it is the nakedness of your brother.

But she answered them, "Return, my daughters. Why come with me? Do I have any more sons in my womb, so that you could hope for husbands from me?