לֹא־יִקַּ֥ח אִ֖ישׁ אֶת־אֵ֣שֶׁת אָבִ֑יו וְלֹ֥א יְגַלֶּ֖ה כְּנַ֥ף אָבִֽיו׃ (ס)
A man shall not take his father’s wife, and shall not uncover his father’s skirt.
Read kabbalistic (mystical) interpretation of Deuteronomy 23:1: and classical mystical sources.