8 Bible Verses about Unforgivable Sin

Therefore, I say to you, every sin and blasphemy will be forgiven to men, but the blasphemy against the Holy Spirit shall not be forgiven. And whosoever speaks a word against the Son of Man, it shall be forgiven him; but whosoever speaks against the Holy Spirit, it shall not be forgiven, neither in this age nor in that which is to come.

Verily I say to you, all the sins will be forgiven the sons of men, and the blasphemies whatsoever they blaspheme; but whosoever blasphemes against the Holy Spirit has no forgiveness forever, but is guilty of an eternal sin;

And every one who shall say a word against the Son of Man, it shall be forgiven him; but to him who blasphemes against the Holy Spirit, it shall not be forgiven.

For, if we sin wilfully after we received the full knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment and fierceness of fire about to devour the opposers. Anyone, having set aside Moses' law, dies without mercy on the testimony of two or three witnesses;read more.
of how much worse punishment, think ye, shall he be accounted worthy, who trampled under foot the Son of God, and accounted the blood of the covenant with which He was sanctified an unholy thing, and treated with contempt the Spirit of grace?

because they said, 'He hath an unclean spirit.'"

But the Pharisees, hearing it, said, "This Man doth not cast out the demons, except by Beelzebub, prince of the demons."

And the scribes who came down from Jerusalem said, "He hath Beelzebub, and by the ruler of the demons casteth out the demons."

But some of them said, "By Beelzebub, the ruler of the demons, He is casting out the demons."