Heb.11.4  By faith Abel offered to God a more acceptable sacrifice than Cain, through which he received approval as righteous, God bearing witness by accepting his gifts; he died, but through his faith he is still speaking.
1John.3.12  and not be like Cain who was of the evil one and murdered his brother. And why did he murder him? Because his own deeds were evil and his brother's righteous.
Jude.1.11  Woe to them! For they walk in the way of Cain, and abandon themselves for the sake of gain to Balaam's error, and perish in Korah's rebellion.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.