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.

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.