8 Bible Verses about Apostate Believers

Brothers, even if a man is caught in some fault, you who are spiritual must restore such a one in a spirit of gentleness; looking to yourself so that you also aren't tempted.

In the name of our Lord Jesus Christ, you being gathered together, and my spirit, with the power of our Lord Jesus Christ, are to deliver such a one to Satan for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.

Brothers, if any among you wanders from the truth, and someone turns him back, let him know that he who turns a sinner from the error of his way will save a soul from death, and will cover a multitude of sins.

If anyone sees his brother sinning a sin not leading to death, he shall ask, and God will give him life for those who sin not leading to death. There is a sin leading to death. I don't say that he should make a request concerning this. All unrighteousness is sin, and there is a sin not leading to death.

let him know that he who turns a sinner from the error of his way will save a soul from death, and will cover a multitude of sins.

For concerning those who were once enlightened and tasted of the heavenly gift, and were made partakers of the Holy Spirit, and tasted the good word of God, and the powers of the age to come, and then fell away, it is impossible to renew them again to repentance; seeing they crucify the Son of God for themselves again, and put him to open shame.read more.
For the land which has drunk the rain that comes often on it, and brings forth a crop suitable for them for whose sake it is also tilled, receives blessing from God; but if it bears thorns and thistles, it is rejected and near being cursed, whose end is to be burned.

For if we sin willfully after we have received the knowledge of the truth, there remains no more a sacrifice for sins, but a certain fearful expectation of judgment, and a fierceness of fire which will devour the adversaries. A man who disregards Moses' law dies without compassion on the word of two or three witnesses.read more.
How much worse punishment, do you think, will he be judged worthy of, who has trodden under foot the Son of God, and has counted the blood of the covenant with which he was sanctified an unholy thing, and has insulted the Spirit of grace?

So, because you are lukewarm, and neither hot nor cold, I will vomit you out of my mouth.