Leviticus 22:4 Kabbalah

אִ֣ישׁ אִ֞ישׁ מִזֶּ֣רַע אַהֲרֹ֗ן וְה֤וּא צָר֙וּעַ֙ א֣וֹ זָ֔ב בַּקֳּדָשִׁים֙ לֹ֣א יֹאכַ֔ל עַ֖ד אֲשֶׁ֣ר יִטְהָ֑ר וְהַנֹּגֵ֙עַ֙ בְּכָל־טְמֵא־נֶ֔פֶשׁ א֣וֹ אִ֔ישׁ אֲשֶׁר־תֵּצֵ֥א מִמֶּ֖נּוּ שִׁכְבַת־זָֽרַע׃

What man soever of the seed of Aaron is a leper, or hath an issue, he shall not eat of the holy things, until he be clean. And whoso toucheth any one that is unclean by the dead; or from whomsoever the flow of seed goeth out;

Read kabbalistic (mystical) interpretation of Leviticus 22:4: and classical mystical sources.