Muhammad 47:18

فَهَلۡ يَنظُرُونَ إِلَّا ٱلسَّاعَةَ أَن تَأۡتِيَهُم بَغۡتَةٗۖ فَقَدۡ جَآءَ أَشۡرَاطُهَاۚ فَأَنَّىٰ لَهُمۡ إِذَا جَآءَتۡهُمۡ ذِكۡرَىٰهُمۡ 18

Then do they await except that the Hour should come upon them unexpectedly? But already there have come [some of] its indications. Then what good to them, when it has come, will be their remembrance