noun

the action or offence of speaking sacrilegiously about God or sacred things; profane talk.

he was detained on charges of blasphemy

profanity,profaneness,sacrilege,irreligiousness,irreverence,taking the Lord’s name in vain,swearing,curse,cursing,impiety,impiousness,ungodliness,unholiness,desecration,disrespect,imprecation,execration