Al-'Ankabut 29:53

WayastaAAjiloonaka bilAAathabiwalawla ajalun musamman lajaahumu alAAathabuwalaya/tiyannahum baghtatan wahum la yashAAuroon

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.

They ask you to bring the punishment soon. Had there not been an appointed time, the punishment would have come to them. It will surely come to them suddenly while they will not be aware.