Al-Waaqia • BN-TAFSEER-IBN-E-KASEER
﴿ وَإِنَّهُۥ لَقَسَمٌۭ لَّوْ تَعْلَمُونَ عَظِيمٌ ﴾
“and, behold, this is indeed a most solemn affirmation, if you but knew it!”
Please check ayah 56:82 for complete tafsir.