Surah Al-Waqi'ah
Al-Waqi'ah 56:76
Ayah 76 of 96
وَإِنَّهُۥ لَقَسَمٞ لَّوۡ تَعۡلَمُونَ عَظِيمٌ
And indeed, it is an oath - if you could know - [most] great
Transliteration
Wainnahu laqasamun law taʿlamoona ʿatheemun
Read the whole surah from here
Quran text: Tanzil (tanzil.net). Translation: Saheeh International. Recitation: Sheikh Mahmoud Khalil al-Husary.