Hebrews 10:26
For if we sin willfully, after we have received the knowledge of the truth, there remains no longer a sacrifice for sins;
Matthew 12:32
And whoever shall speak a word against the Son of man, it shall be forgiven him: but whoever shall speak against the Holy Spirit, it shall not be for given him, either in the present age, or in that which is to come.
Hebrews 10:29
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?
2 Peter 2:10
but especially those who walk after the flesh in unclean lust, and who despise government. Presumptuous, willful men! they are not afraid to speak evil of dignitaries: