Kabbalah su Proverbi 14:78

Concerning people of these three types, we may say that, although their intention is to exalt this science, they are, truthfully, not qualified to speak of it. Who should come and testify—one who has not observed the moon or one who has?⁵Witnesses to the sighting of a new moon were rigorously interrogated. See Mishnah, Rosh ha-Shanah 2:6. True it is that this science is sublime and exalted, as we will yet indicate with God’s help. However, concerning these people and their ilk, we must say [that they are] those who speak of you with deliberate evil (Ps. 139:20). Of them it is said, Wisdom is too high for a fool; he dare not open his mouth in the gates (Prov. 24:7). It is also written, The conceited man seeks wisdom yet finds none; to one of understanding, knowledge comes easily (Prov. 14:6). It is also written, I love those who love me; those who search for me find me (Prov. 8:17). There are many similar [verses] in the admonitions of King Solomon, peace upon him.

The punishment of having relations with a maidservant is stated in Vayikra Rabbah: “If he offer it for a thanksgiving” (Leviticus 7:12), that which it says “Fools mock at making amends for sin” (Proverbs 14:9), Rabbi Yudan says that this fool states his punishment verbally to all and says ‘Do I not need to bring a sin-offering nor a guilt-offering?’ Rabbi Yudan said in the name of Rabbi Levi: these people that rule that it is permitted to have relations with maidservants in this World, the Creator hangs them by the crown of their head in the World to Come, as it says “Surely God will shatter the head of His enemies, The hairy crown of him who goes on in his guilty deeds.” (Psalms 68:22). Meaning that all will say: that man will perish because of his misdeed.