We have sent you Muhammad (s) with the truth the guidance a bearer of good tidings of Paradise for those who respond to this guidance and warner of the Fire to those who do not respond to it. You shall not be asked about the inhabitants of Hell-fire that is about why the disbelievers did not believe for your responsibility is only to deliver the Message a variant reading of lā tus’al is lā tas’al ‘do not ask’ with the final apocopation of the vowel on account of it being an imperative.
