1 John 3:12-15

12Do not be like Cain, who belonged to the evil one and murdered his brother. And why did Cain slay him? Because his own deeds were evil, while those of his brother were righteous. 13So do not be surprised, brothers, if the world hates you.

14We know that we have passed from death to life, because we love our brothers. The one who does not love remains in death. 15Everyone who hates his brother is a murderer, and you know that eternal life does not reside in a murderer.