Deuteronomio 27:21 Cabala: Zohar

Some of them {these 'demons'} ...are like beasts that increase and multiply like animals, and their form below is ignorant people, who, as the sages of the Mishnah explained, are vermin and whose daughters are abominable. Of their daughters it says, "Cursed be he that lies with any manner of beast" (Deuteronomy 27:21). They hate Torah students, sages of the Mishnah, who are in truth like the ministering angels. For that reason the sages of the Mishnah explained about man that if he is as "a messenger of Hashem Tzva'ot" (Malachi 2:7), one should seek Torah out of his mouth. Otherwise, one must not seek Torah out of his mouth.