2 verses very important.
book of enoch chapter 22: verse 6:
and I asked Rufael, the angel who was with me, and said to him, “This spirit, the voice of which is reaching into heaven like this and is making suit, who’s spirit is it?”
22:7: and he answered me, saying, this is the spirit who has left abel, whom cain, his brother, had killed; it continues to sue him until all of Cain’s seed is exterminated from the face of the earth, and his seed has exterminated from the seed of the people.