Al-A'raf 7:187 يسالونك عن الساعة ايان مرساها قل انما علمها عند ربي لا يجليها لوقتها الا هو ثقلت في السماوات والارض لا تاتيكم الا بغتة يسالونك كانك حفي عنها قل انما علمها عند الله ولاكن اكثر الناس لا يعلمون ١٨٧

They ask you [Prophet] about the Hour, ‘When will it happen?’ Say, ‘My Lord alone has knowledge of it: He alone will reveal when its time will come, a time that is momentous in both the heavens and earth. All too suddenly it will come upon you.’ They ask you about it as if you were eager [to find out]. Say, ‘God alone has knowledge of [when it will come], though most people do not realize it.’