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 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.”