Cain banished from Earth

 Zohar (Bereishis 009b) When Cain was banished from the face of the earth, he descended into that land and there propagated his kind. That earth consists of two sections, one enveloped in light, the other in darkness, and there are two chiefs, one ruling over the light, the other over the darkness. These two chiefs were at perpetual war with each other, until the time of Cain's arrival, when they joined together and made peace; and therefore they are now one body with two heads. These two chiefs were named Afrira and Kastimon. They, moreover, bear the likeness of holy angels, having six wings. One of them had the face of an ox and the other that of an eagle. But when they became united they assumed the image of a man. In time of darkness they change into the form of a two-headed serpent, and crawl like a serpent, and swoop into the abyss, and bathe in the great sea. When they reach the abode of Uzza and Azael they stir them up and rouse them. These then leap into the dark mountains”, thinking that their day of judgement has come before the Holy One, blessed be His Name. The two chiefs then swim about in the great sea, and when night comes they fly off to Na'amah, the mother of the demons, by whom the first saints were seduced; but when they think to approach her she leaps away six thousand parasangs, and assumes all shapes and forms in the midst of the sons of men, so that the sons of men may be led astray after her. These two chiefs then fly about through the world, and return to their abode, where they arouse sensual desires in the descendants of Cain to bear children. The heaven above that earth is not like ours, nor are the seasons of seed and harvest the same as ours, but they only return after cycles of many years. These Elohim, then, who have not made heaven and earth may perish from the upper earth of the universe, so that they should have no dominion there, should not traverse it and should not cause men to pollute themselves “through anything that chanceth by night; and for that they will perish from the earth and from underneath the heaven which were made in the name of Eleh, as has been explained above. It is for that reason that this verse has been written in Aramaic, so that the angels should not think that they are alluded to and so bring accusations against us. This, too, is the secret of the last word, to wit, Eleh, which being a sacred name, could not be altered into Aramaic.