By faith, Abel offered to God a more excellent sacrifice than Cain, through which he had testimony given to him that he was righteous, God testifying with respect to his gifts; and through it he, being dead, still speaks.

unlike Cain, who was of the evil one, and killed his brother. Why did he kill him? Because his works were evil, and his brother's righteous.

Woe to them! For they went in the way of Cain, and ran riotously in the error of Balaam for hire, and perished in Korah's rebellion.