Mark 3:29

But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:
— Mark 3:29, King James Version

In other translations

World English Bible (WEB)

but whoever may blaspheme against the Holy Spirit never has forgiveness, but is guilty of an eternal sin"

American Standard Version (ASV)

but whosoever shall blaspheme against the Holy Spirit hath never forgiveness, but is guilty of an eternal sin:

Young's Literal Translation (YLT)

but whoever may speak evil in regard to the Holy Spirit hath not forgiveness--to the age, but is in danger of age-during judgment;'