Luke 12:10-12

And everyone who speaks a word against the Son of Man, it will be forgiven him; but he who blasphemes against the Holy Spirit [that is, whoever intentionally discredits the Holy Spirit by attributing the authenticating miracles done by Me to Satan], it will not be forgiven him [for him there is no forgiveness]. [Matt 12:31; Mark 3:28-30] When they bring you before the synagogues and the magistrates and the authorities, do not be worried about how you are to defend yourselves or what you are to say; for the Holy Spirit will teach you in that very hour what you ought to say.”