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fa-la-nudhīqanna lladhīna kafarū ʿadhāban shadīdan wa-la-najziyannahum ʾaswaʾa lladhī kānū yaʿmalūna
We will surely make the faithless taste a severe punishment, and We will surely requite them by the worst of what they used to do.
— Ali Quli Qarai
Surah Fussilat - Verses 26 - 28
26. And those who disbelieve say: “Listen not to this Qur’an, and make noise in the midst of its [recitation] that you may overcome.”
27. But surely, We shall cause those who disbelieve to taste a severe torment and certainly, We shall requite them the worst of what they used to do.
28. That is the recompense of the enemies of Allah: the Fire. Therein will be for them the eternal home, a recompense for that they used to deny Our Ayat [Signs, Verses].
Propaganda against religion has existed at all times. Those whose words do not stand to reason, hinder people from listening to the logical words uttered by others. The clause wa alghu fihi indicates “they endeavor to make deviation in the True Path through vain acts, e.g. whistling, clapping, making noise, telling tales, creating suspicions, and raising irrelevant questions.” It is narrated from Ibn ‘Abbas concerning the occasion of Revelation of blessed Verse 26 that the chiefs of disbelievers failed at imitating Qur’anic Verses and were afraid that Arabs from different regions depart for Mecca and believe in the Prophetic Call.
Following consultations they decided to distract the Prophet (S) and his audience while he was reciting the Holy Qur’an. Serving this purpose, they gathered at his reciting the Qur’anic Verses and sang songs, uttered vain words, whistled, and clapped their hands so as to impede the audience from listening to the Noble Prophet (S). It is in this vein that the blessed Verse says:
Enemies of religion imagined that they could extinguish Divine Light, but they were unaware that Divine Light may not be put out. Verse 27 is saying that disbelievers resorted to such inappropriate and inhumane act imagining that they could succeed in their evil ways, but were unaware that they would fail and thereby pave the way for their perdition since it is emphatically stated that they shall taste excruciating torments and chastisements for their vicious deeds.
Verse 28 makes a reference to the previous Verse saying that the torment shall be very painful and enemies of God shall be chastised by Hellfire therein shall be their everlasting abode as a recompense for their denial of Divine Revelations.