357. "You shall not uncover the nakedness of your father's sister..." (Vayikra 18:12). Rabbi Chiya opened the discussion saying, "And if a man shall take his sister, his father's daughter, or his mother's daughter, and see her nakedness..." (Vayikra 20:17). We have learned that Adam lived apart from his wife for 130 years and did not beget children, since Adam did not want to copulate with his wife after Cain slew Abel. Rabbi Yosi taught that from the time death was decreed for him and all mankind, he has said, why should I beget children that will be destroyed? He immediately separated from his wife.
358. Two female spirits used to come and couple with him and they gave birth. They gave birth to demons called the plagues of mankind. They would fly to people and rest at their doors, wells and restrooms. Therefore all DEMONS flee and distance themselves from people who have on their door posts the holy name Shadai of the supernal Sfirot. This is the essence of the verse, "Nor shall any plague come near your dwelling" (Tehilim 91:10). What is meant by "nor shall any plague come near?" It is the MENTIONED plagues of people.
359. We have learned that when Adam descended with the supernal image, a holy form, and those on high and below saw him, they approached him and crowned him ruler over this world. Later, when the serpent came upon Eve, it injected its filth in her. Following this, she gave birth to Cain; SHE DELIVERED CAIN FROM THE FILTH OF THE SERPENT. From that genealogy were the subsequent generations of the world's evildoers and the habitations of demons and spirits come from there and his side. For this reason, all spirits and demons in the world are partly of people below and partly of the angels on high, AS THEY ARE BORN HALF FROM THE FILTH OF THE SERPENT, UPON IT WHICH THE ANGEL SAMAEL RODE. THEREFORE, HALF STEM FROM THE ANGELS. THEIR OTHER HALF IS HUMAN, BECAUSE THEY WERE BORN FROM CAIN WHO WAS HUMAN. These other DEMONS born from Adam THROUGH TWO FEMALE SPIRITS, AS MENTIONED ABOVE, are all similar as they stem half from below and half from above.