Kabbalah Maleakhi 2:3: Sha'arei Kedusha

In Zohar Terumah it states,⁴⁹⁶Zohar II 141a “The spirit of impurity has no dominion over the bodies of the righteous Tzaddikim who, in this world, were not drawn after the pleasures and lusts of that extraneous husk (Kelipah). For, they have not pleasured themselves in this world at all, except for fulfilling the mitzvah of pleasure on Shabbat and Biblical Festivals. The spirit of impurity thus has no dominion or hold on them at all, since they have not derived any pleasure whatsoever from that which is the opposite Holiness (Sitra Achara). However, about a person who did derive pleasure from the opposite the Holiness (Sitra Achara) during the mundane days of the week, the verse states,⁴⁹⁷Malachi 2:3 ‘I will smear dung upon your faces, the dung of your festive offerings, and you shall be carried out to its heap.’”