English translation of the verse 35 surah - Verily, it (Hell, or their denial of the Prophet Muhammad SAW, or

Surat Al-Muddaththir Verse No. 35: Reading and listening

Translation of the verse 35 from Surah Al-Muddaththir : Number of verses 56 - - page 576 - Part 29.

﴾إِنَّهَا لَإِحۡدَى ٱلۡكُبَرِ ﴿
[ المدّثر: 35]

Verily, it (Hell, or their denial of the Prophet Muhammad SAW, or the Day of Resurrection) is but one of the greatest calamities.

English - Sahih International

Indeed, the Fire is of the greatest [afflictions]

Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(74:35) surely (Hell) is one of the greatest Signs, *28

Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

*28) That is, "Just as the moon and the night and the day are the great signs of the powers of Allah, so also is Hell a great sign of His powers. If the existence of the moon and the alternation of the night and day so regularly were not impossible, why should the existence of Hell be impossible as you think it is? You see these phenomena day and night; therefore, they do not surprise you: otherwise these things in themselves also are great marvels of the powers of Allah. If you had not observed them and somebody were to tell you that there is also such a thing as the moon in the world, or, there is a sun which leaves the world dark when it hides and makes the world shine forth with light when it appears, then the people like you would have made jests of it too as you make jests of Hell."
 

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Source : Al-Muddaththir Verse 35: Indeed, the Fire is of the greatest [afflictions]