Al-Muddaththir • BN-TAFSEER-IBN-E-KASEER
﴿ فَذَٰلِكَ يَوْمَئِذٍۢ يَوْمٌ عَسِيرٌ ﴾
“that very Day shall be a day of anguish,”
Please check ayah 74:10 for complete tafsir.