Al Jathiyah Ayah 32

وَإِذَا قِيلَ إِنَّ وَعْدَ ٱللَّهِ حَقٌّ وَٱلسَّاعَةُ لَا رَيْبَ فِيهَا قُلْتُم مَّا نَدْرِى مَا ٱلسَّاعَةُ إِن نَّظُنُّ إِلَّا ظَنًّا وَمَا نَحْنُ بِمُسْتَيْقِنِينَ ٣٢ And whenever it was said ?to you?, ‘Surely Allah’s promise ?of judgment? is true and there is no doubt about the Hour,’ you said ?mockingly?, ‘We do not know what the Hour is! We think it is no more than speculation, and we are not convinced ?that it will ever come?.’”