1 John 3:12-15

not as Cain was of the evil one, and slew his brother. And wherefore slew he him? Because his works were evil, and his brother’s righteous. Marvel not, brethren, if the world hateth you. We know that we have passed out of death into life, because we love the brethren. He that loveth not abideth in death. Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.