Al A'raf, 187 Ayah
7:187
يَسۡـَٔلُونَكَ عَنِ ٱلسَّاعَةِ أَيَّانَ مُرۡسَىٰهَاۖ قُلۡ إِنَّمَا عِلۡمُهَا عِندَ رَبِّيۖ لَا يُجَلِّيهَا لِوَقۡتِهَآ إِلَّا هُوَۚ ثَقُلَتۡ فِي ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِۚ لَا تَأۡتِيكُمۡ إِلَّا بَغۡتَةٗۗ يَسۡـَٔلُونَكَ كَأَنَّكَ حَفِيٌّ عَنۡهَاۖ قُلۡ إِنَّمَا عِلۡمُهَا عِندَ ٱللَّهِ وَلَٰكِنَّ أَكۡثَرَ ٱلنَّاسِ لَا يَعۡلَمُونَ ١٨٧
Yas'alūnaka `Ani As-Sā`ati 'Ayyāna Mursāhā ۖ Qul 'Innamā `Ilmuhā `Inda Rabbī ۖ Lā Yujallīhā Liwaqtihā 'Illā Huwa ۚ Thaqulat Fī As-Samāwāti Wa Al-'Arđi ۚ Lā Ta'tīkum 'Illā Baghtatan ۗ Yas'alūnaka Ka'annaka Ĥafīyun `Anhā ۖ Qul 'Innamā `Ilmuhā `Inda Al-Lahi Wa Lakinna 'Akthara An-Nāsi Lā Ya`lamūna
They ask you, [O Muhammad], 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 Allah, but most of the people do not know."