8 Bible Verses about Apostate Believers

Brethren, if a man be overtaken in any fault, do you, who are spiritual, restore such a one in the spirit of meekness, considering yourself, lest you also be tempted.

in the name of our Lord Jesus Christ, when you and my spirit have come together, with the power of our Lord Jesus Christ, that we deliver such a one over to Satan, for the destruction of the flesh, that the spirit may be saved in the day of the Lord Jesus.

Brethren, if any among you should err from the truth, and one should turn him back, let him know that he who turns back a sinner from the error of his way, will save a soul from death, and cover a multitude of sins.

If any one see his brother sinning a sin not to death, he shall ask, and he will give him life for those who sin not to death. There is a sin to death: I do not say concerning this, that he should ask. All unrighteousness is sin; and there is a sin not to death.

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

For it is impossible to renew again to repentance those who have once been enlightened, and have tasted of the heavenly gift, and have been made partakers of the Holy Spirit, and have tasted the good word of God, and the powers of the coming age, if they fall away; since they again crucify in themselves the Son of God, and put him to an open shame.read more.
For the land which drinks up the rain that comes often upon it, and produces herbs suitable for those for whom it is cultivated, receives blessing from God. But that which produces thorns and thistles is rejected, and is near the curse, the end of which is to be burned.

For if we sin willfully, after we have received the knowledge of the truth, there remains no longer a sacrifice for sins; but a certain fearful looking for of judgment, and a fiery indignation which will devour the adversaries. He that despised Moses law, died without mercy, on the testimony of two or three witnesses:read more.
of how much severer punishment do you think he shall be thought worthy, who has trodden under foot the Son of God, and has counted the blood of the covenant, with which he was sanctified, a common thing, and has done despite to the Spirit of grace?

So, then, because you are luke-warm, and neither cold, nor hot, I will vomit you out of my mouth.