Al-Muddaththir • EN-TAFSIR-IBN-ABBAS
﴿ فَذَٰلِكَ يَوْمَئِذٍۢ يَوْمٌ عَسِيرٌ ﴾
“that very Day shall be a day of anguish,”
(Surely that day) i.e. the Day of Judgement (will be a day of anguish) will be a severe day,