Surah Al-'Ankabut — Ayah 53 (29:53)
وَيَسۡتَعۡجِلُونَكَ بِٱلۡعَذَابِ وَلَوۡلَآ أَجَلٞ مُّسَمّٗى لَّجَآءَهُمُ ٱلۡعَذَابُۚ وَلَيَأۡتِيَنَّهُم بَغۡتَةٗ وَهُمۡ لَا يَشۡعُرُونَ ٥٣
English translation (Saheeh International)
And they urge you to hasten the punishment. And if not for [the decree of] a specified term, punishment would have reached them. But it will surely come to them suddenly while they perceive not.
Brief commentary
O Messenger! The idolaters want for you to bring quickly the punishment you warned them of. Had it not been for Allah already having decreed an unmovable time for their punishment, it would definitely have come upon them. And it will come upon them suddenly, when they do not expect it to.