GOD'S WORD® Translation
Don't be like Cain. He was a child of the evil one and murdered his brother. And why did Cain murder his brother? Because the things Cain did were evil and the things his brother did had God's approval.

American Standard Version
not as Cain was of the evil one, and slew his brother. And wherefore slew he him? Because his works were evil, and his brother's righteous.

Berean Study Bible
Do 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.

Douay-Rheims Bible
Not as Cain, who was of the wicked one, and killed his brother. And wherefore did he kill him? Because his own works were wicked: and his brother's just.

English Revised Version
not as Cain was of the evil one, and slew his brother. And wherefore slew he him? Because his works were evil, and his brother's righteous.

King James Bible
Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother's righteous.

World English Bible
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.

Young's Literal Translation
not as Cain -- of the evil one he was, and he did slay his brother, and wherefore did he slay him? because his works were evil, and those of his brother righteous.

1 John 3:12 Additional Translations ...