Az Zukhruf Ayah 61
وَإِنَّهُۥ لَعِلْمٌ لِّلسَّاعَةِ فَلَا تَمْتَرُنَّ بِهَا وَٱتَّبِعُونِۚ هَـٰذَا صِرَٲطٌ مُّسْتَقِيمٌ ٦١
And his ?second? coming is truly a sign for the Hour. So have no doubt about it, and follow me. This is the Straight Path.