8 Bible Verses about Unforgivable Sin

So I tell you, every sin and blasphemy will be forgiven, but blasphemy against the Spirit will not be forgiven. Whoever speaks a word against the Son of Man will be forgiven, but whoever speaks against the Holy Spirit will not be forgiven, either in this age or in the one to come."

I tell all of you with certainty, people will be forgiven their sins and whatever blasphemies they utter. But whoever blasphemes against the Holy Spirit can never be forgiven, but is guilty of eternal sin."

Everyone who speaks a word against the Son of Man will be forgiven, but the person who blasphemes against the Holy Spirit won't be forgiven.

For if we choose to go on sinning after we have learned the full truth, there no longer remains a sacrifice for sins, but only a terrifying prospect of judgment and a raging fire that will consume the enemies of God. Anyone who violates the Law of Moses dies without mercy "on the testimony of two or three witnesses." read more.
How much more severe a punishment do you think that person deserves who tramples on God's Son, treats as common the blood of the covenant by which it was sanctified, and insults the Spirit of grace?

"because they had been saying, "He has an unclean spirit."

But when the Pharisees heard this, they said, "This man drives out demons only by Beelzebul, the ruler of the demons."

The scribes who had come down from Jerusalem kept repeating, "He has Beelzebul," and, "He drives out demons by the ruler of demons."

But some of them said, "He drives out demons by Beelzebul, the ruler of the demons."