עֶרְוַ֥ת אֵֽשֶׁת־אָבִ֖יךָ לֹ֣א תְגַלֵּ֑ה עֶרְוַ֥ת אָבִ֖יךָ הִֽוא׃ (ס)
The nakedness of thy father’s wife shalt thou not uncover: it is thy father’s nakedness.
Targum Jonathan on Leviticus
The nakedness of thy father's wife thou shalt not dishonour, for it is the nakedness of thy father.