Luke 11:51
"from the blood of Abel to the blood of Zachariah, who perished between the alter and the sanctuary; yes; I tell you, it shall be required of this generation!
John 8:44
"You are of your father, the devil, and you want to do what your father desires. He was a man-slayer from the very beginning; and he has no standing place in the truth, because truth is not in him. Whenever he utters a lie, he speaks from his nature, for he is a liar and the father of lying.
1 John 3:10
In this the children of God are manifest, and the children of the devil; for every one who does not work righteousness is not a child of God, nor is he who does not love his brother.
1 John 3:12
We are not to be like Cain, who belonged to the Evil One, and murdered his brother. And why did he murder him? It was because his own deeds were evil, and his brother's, righteous.
1 John 3:15
Every one who is hating his brother is a murderer, and you know that no murderer has eternal life abiding in him.