Leviticus 18:7

You shall not uncover the nakedness of your father, which is the nakedness of your mother; she is your mother, you shall not uncover her nakedness.

“ ‘Do not dishonor your father by having sexual relations with your mother. She is your mother; do not have relations with her.

You are not to violate the intimacy that belongs to your father and mother. She is your mother; you must not have sexual intercourse with her.

“Do not violate your father by having sexual relations with your mother. She is your mother; you must not have sexual relations with her.

You must not expose your father’s nakedness or your mother’s nakedness—she is your mother; you must not expose her nakedness.

The nakedness of thy father, or the nakedness of thy mother, shalt thou not uncover: she is thy mother; thou shalt not uncover her nakedness.