By faith Abel offered unto God a more excellent sacrifice than Cain, through which he had witness borne to him that he was righteous, God bearing witness in respect of his gifts: and through it he being dead yet speaketh.

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.

Woe unto them! For they went in the way of Cain, and ran riotously in the error of Balaam for hire, and perished in the gainsaying of Korah.