Mark 3:29 in the World English Bible
but whoever may blaspheme against the Holy Spirit never has forgiveness, but is subject to eternal condemnation.”
Context
28 Verily I say unto you, All sins shall be forgiven unto the sons of men, and blasphemies wherewith soever they shall blaspheme:
29 But he that shall blaspheme against the Holy Ghost hath never forgiveness, but is in danger of eternal damnation:
30 Because they said, He hath an unclean spirit.