Al-Ahzab 33:66 يوم تقلب وجوههم في النار يقولون يا ليتنا اطعنا الله واطعنا الرسولا ٦٦

No One knows when the Day of Resurrection will come except Allah

Here Allah tells His Messenger that he cannot know when the Hour will come, and if people ask him about that, He instructs him to refer the matter to Allah, may He be exalted, as Allah says in Surat Al-A`raf, even though that was reveal