Leviticus 18:14

New 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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If a man lies with his uncle’s wife, he has uncovered his uncle’s nakedness. They shall bear their sin; they shall die childless.

You shall not uncover the nakedness of your mother’s sister, for she is near of kin to your mother.