1 John 2:19
they went out from us, but they were not of us: for if they had been of us, they would no doubt have continued with us: but they went out, that it might be manifest, that they were not all of us.
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.
2 Corinthians 6:15
what concord can Christ maintain with Belial? what concern has a believer with an infidel?
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.
Jude 1:19
these are they who distinguish themselves, though they are sensual, and have nothing that is spiritual.