1 John 3:10-14 CSB
This is how God’s children and the devil’s children become obvious. Whoever does not do what is right is not of God, especially the one who does not love his brother or sister.
For this is the message you have heard from the beginning: We should love one another, unlike Cain, who was of the evil one and murdered his brother. And why did he murder him? Because his deeds were evil, and his brother’s were righteous.
Do not be surprised, brothers and sisters, if the world hates you. We know that we have passed from death to life because we love our brothers and sisters. The one who does not love remains in death.
CSB: Christian Standard Bible