וְאִ֗ישׁ אֲשֶׁ֤ר יִשְׁכַּב֙ אֶת־אֵ֣שֶׁת אָבִ֔יו עֶרְוַ֥ת אָבִ֖יו גִּלָּ֑ה מֽוֹת־יוּמְת֥וּ שְׁנֵיהֶ֖ם דְּמֵיהֶ֥ם בָּֽם׃
And the man that lieth with his father’s wife—he hath uncovered his father’s nakedness—both of them shall surely be put to death; their blood shall be upon them.
Read kabbalistic (mystical) interpretation of Leviticus 20:11: and classical mystical sources.