56:76
وَإِنَّهُۥ لَقَسَمٌ لَّوْ تَعْلَمُونَ عَظِيمٌ
wa-innahu laqasamun law taʿlamūna ʿaẓīmun
And indeed, it is an oath - if you could know - [most] great.
— Saheeh International
a mighty oath, if you only knew-
— M. A. S. Abdel Haleem
And verily that is indeed a great oath, if you but know.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali