Mark 3:28-30

Darby(i) 28 Verily I say unto you, that all sins shall be forgiven to the sons of men, and all the injurious speeches [with] which they may speak injuriously; 29 but whosoever shall speak injuriously against the Holy Spirit, to eternity has no forgiveness; but lies under the guilt of an everlasting sin; 30 -- because they said, He has an unclean spirit.