Surah Al-An'am — Ayah 30 (6:30)
وَلَوۡ تَرَىٰٓ إِذۡ وُقِفُواْ عَلَىٰ رَبِّهِمۡۚ قَالَ أَلَيۡسَ هَٰذَا بِٱلۡحَقِّۚ قَالُواْ بَلَىٰ وَرَبِّنَاۚ قَالَ فَذُوقُواْ ٱلۡعَذَابَ بِمَا كُنتُمۡ تَكۡفُرُونَ ٣٠
English translation (Saheeh International)
If you could but see when they will be made to stand before their Lord. He will say, "Is this not the truth?" They will say, "Yes, by our Lord." He will [then] say, "So taste the punishment for what you used to deny."
Brief commentary
If you, O Messenger, could only see when those who denied the resurrection will be made to stand before their Lord, you would see a remarkable sight of their trouble when Allah will say to them: Is this resurrection that you used to deny not the truth about which there is no doubt? They will say: I swear by our Lord Who created us, it is certainly true and there is no doubt about it. Allah will then say to them: Taste the punishment that is a result of your denial of this day, which you used to reject in the life of the world.