Al-A'raf 7:187

Yas-aloonaka AAani assaAAatiayyana mursaha qul innama AAilmuhaAAinda rabbee la yujalleeha liwaqtiha illahuwa thaqulat fee assamawati wal-ardila ta/teekum illa baghtatan yas-aloonaka kaannaka hafiyyunAAanha qul innama AAilmuha AAinda Allahiwalakinna akthara annasi layaAAlamoon

They ask you, [O Muḥammad], about the Hour: when is its arrival? Say, "Its knowledge is only with my Lord. None will reveal its time except Him. It lays heavily upon the heavens and the earth. It will not come upon you except unexpectedly." They ask you as if you are familiar with it. Say, "Its knowledge is only with Allāh, but most of the people do not know."

They ask you about the Hour (i.e. the Doomsday), “When is it due to happen?” Say, “Its knowledge is only with my Lord. No one can unfold it except He at its time. It shall weigh heavy in the heavens and the earth. It shall not come upon you but suddenly.” They ask you as if you were aware of it. Say, “Its knowledge is only with Allah, but most of the people do not know.”