Leviticus 18:14

Modern King James Version

You shall not uncover the nakedness of your father's brother. You shall not approach his wife. She is your aunt.

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You shall not uncover the nakedness of your mother's sister. For she is your mother's near kinswoman.

And if a man shall lie with his uncle's wife, he has uncovered his uncle's nakedness. They shall bear their sin. They shall die childless.