Al-Ahzab - 33:63

يَسْأَلُكَ النَّاسُ عَنِ السَّاعَةِ قُلْ إِنَّمَا عِلْمُهَا عِندَ اللَّهِ وَمَا يُدْرِيكَ لَعَلَّ السَّاعَةَ تَكُونُ قَرِيبًا
[33:63]
Men ask you about the hour; say: The knowledge of it is only with Allah, and what will make you comprehend that the : hour may be nigh.
Men ask thee concerning the Hour: Say, "The knowledge thereof is with Allah (alone)": and what will make thee understand?- perchance the Hour is nigh!
Men ask thee of the Hour. Say: The knowledge of it is with Allah only. What can convey (the knowledge) unto thee? It may be that the Hour is nigh.