56:76
وَاِنَّهُ لَقَسَمٌ لَوْ تَعْلَمُونَ عَظٖیمٌۙ
Wainnahu laqasamun law taAAlamoona AAatheemun
Translations
And indeed, it is an oath - if you could know - [most] great
Saheeh International
And lo! that verily is a tremendous oath, if ye but knew
Marmaduke Pickthall