8 Bible Verses about Apostate Believers

Brothers, even if a person is caught in some trespass, you [who are] spiritual restore such a person in a spirit of humility, looking out for yourself, lest you also be tempted.

In the name of our Lord Jesus, [when] you are assembled, and my spirit, together with the power of our Lord Jesus, [I have decided] to hand over such a person to Satan for the destruction of the flesh, in order that his spirit may be saved in the day of the Lord.

My brothers, if anyone among you should wander away from the truth and someone turns him back, he should know that the one who turns a sinner back from the error of his way will save that person's soul from death, and will cover over a great number of sins.

If anyone should see his brother sinning a sin not [leading] to death, he should ask, and he will grant life to him, to those who sin not [leading] to death. ([There] is a sin [leading] to death; I do not say that he should ask about that. All unrighteousness is sin, and [there] is a sin not [leading] to death.)

he should know that the one who turns a sinner back from the error of his way will save that person's soul from death, and will cover over a great number of sins.

For [it is] impossible [concerning] those who have once been enlightened, and have tasted the heavenly gift, and become sharers of the Holy Spirit, and have tasted the good word of God and the powers of the coming age, and having fallen away, to renew [them] again to repentance, [because they] have crucified again for themselves the Son of God and held him up to contempt.read more.
For ground that drinks the rain that comes often upon it, and brings forth vegetation usable to those [people] {for whose sake} [it is] also cultivated, shares a blessing from God. But [if it] produces thorns and thistles, [it is] worthless and near to a curse, whose end [is] for burning.

For [if] we keep on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment and a fury of fire that is about to consume the adversaries. Anyone who rejected the law of Moses dies without mercy on [the testimony of] two or three witnesses.read more.
How much worse punishment do you think the person will be considered worthy of who treats with disdain the Son of God and who considers ordinary the blood of the covenant by which he was made holy and who insults the Spirit of grace?

Thus, because you are lukewarm and neither hot nor cold, I am about to vomit you out of my mouth!