You shall not uncover the nakedness of your mother's sister, for she is near of kin to your mother.
Leviticus 18:13
Surrounding context
18:12 You shall not uncover the nakedness of your father's sister; she is near of kin to your father.
18:13 You shall not uncover the nakedness of your mother's sister, for she is near of kin to your mother.
18:14 You shall not uncover the nakedness of your father's brother. You shall not approach his wife; she is your aunt.