John 8:44
Ye are of your father the Devil; and the desires of your father ye wish to do. He was a murderer from the beginning, and has not stood in the truth, because there is no truth in him. When he speaks a lie, he speaks of his own; because he is a liar, and the father of it.
1 John 3:10
In this are manifest the children of God and the children of the Devil: every one that does not righteousness is not of God, neither he that does not love his brother;
1 John 3:12
not as Cain who was of the evil one, and slew his brother. And wherefore did he slay him? Because his own works were evil, and his brother's righteous.
1 John 3:15
Every one that hates his brother is a murderer; and ye know that no murderer has eternal life abiding in him.