But he who will have blasphemed against the Holy Spirit shall not have forgiveness in eternity; instead he shall be guilty of an eternal offense.
Other versions
King James Version
But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:English Standard Version
but whoever blasphemes against the Holy Spirit never has forgiveness, but is guilty of an eternal sin"--New International Version
But whoever blasphemes against the Holy Spirit will never be forgiven; he is guilty of an eternal sin."