Luke 11:51

from the blood of Abel to that of Zacharias, who perished between the altar and the temple: yes, I assure you, this generation shall be responsible for it all.

John 8:44

you, who have the devil for your father, will execute the designs of your father: he was a murderer from the beginning, and deserted the truth, since he has no love for the truth: when he lyes, he speaks like himself: for he is a lyar, and the father of a lyar.

1 John 3:10

In this the children of God are distinguished from the children of the devil: he that does not practise virtue, and fraternal benevolence, is not of God.

1 John 3:12

not acting like Cain, who was of that wicked one, and slew his brother: but why did he slay him? because his own actions were evil, and his brother's were virtuous.

1 John 3:15

whosoever hateth his brother, has the disposition of a murderer: and you know that no murderer has any title to eternal life.

Treasury of Scripture Knowledge

Summary

And she again bare his brother Abel. And Abel was a keeper of sheep, but Cain was a tiller of the ground.

Bible References

A keeper

John 8:44
you, who have the devil for your father, will execute the designs of your father: he was a murderer from the beginning, and deserted the truth, since he has no love for the truth: when he lyes, he speaks like himself: for he is a lyar, and the father of a lyar.
1 John 3:10
In this the children of God are distinguished from the children of the devil: he that does not practise virtue, and fraternal benevolence, is not of God.