وَإِنَّهُۥ لَقَسَمٌ لَّوْ تَعْلَمُونَ عَظِيمٌ
Asad Quran Translation
and, behold, this is indeed a most solemn affirmation, if you but knew it!
Malik Quran Translation
and it is indeed a mighty oath if you but knew it,
Yusuf Ali Quran Translation
And that is indeed a mighty adjuration if ye but knew 5259
The glory of the firmament as it exists, and the wonder of its passing away, are both evidence, to the discerning mind, of the Future which Allah has prepared, but this evidence can only be effective if men but knew, ie., turned their earnest attention to it.
Mustafa Khattab Quran Translation
and this, if only you knew, is indeed a great oath—
Piktal Quran Translation
And lo! that verily is a tremendous oath, if ye but knew
Wainnahu laqasamun law taAAlamoona AAatheemun