Genesis 38:8

Modern King James Version

And Judah said to Onan, Go in to your brother's wife, and marry her, and raise up seed to your brother.

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And the first-born said to the younger, Our father is old, and there is no man in the earth to come in to us in the way of all the earth.

You shall not uncover the nakedness of your brother's wife. It is your brother's nakedness.

And Naomi said, Turn again, my daughters. Why will you go with me? Are there yet sons in my womb, that they may be your husbands?