1 John 3:10-12

Amplified Bible, Classic Edition

¹⁰ By this it is made clear who take their nature from God and are His children and who take their nature from the devil and are his children: no one who does not practice righteousness [who does not conform to God’s will in purpose, thought, and action] is of God; neither is anyone who does not love his brother (his fellow ^[a]believer in Christ).

¹¹ For this is the message (the announcement) which you have heard from the first, that we should love one another,

¹² [And] not be like Cain who [took his nature and got his motivation] from the evil one and slew his brother. And why did he slay him? Because his deeds (activities, works) were wicked and malicious and his brother’s were righteous (virtuous).