Acharei Mot: Chapter 59

Two female spirits


We learn that after Cain killed Abel, Adam lived apart from his wife for 130 years, not wanting to produce more children that would be destroyed. Female spirits used to couple with him at that time, and they produced demons or plagues. Cain had been born from the filth of the serpent, and from that line all the evildoers of the world have come. For this reason, all spirits and demons in the world are partly of people below and partly of angels.