Al Jathiyah, 32 Ayah
45:32
وَإِذَا قِيلَ إِنَّ وَعۡدَ ٱللَّهِ حَقّٞ وَٱلسَّاعَةُ لَا رَيۡبَ فِيهَا قُلۡتُم مَّا نَدۡرِي مَا ٱلسَّاعَةُ إِن نَّظُنُّ إِلَّا ظَنّٗا وَمَا نَحۡنُ بِمُسۡتَيۡقِنِينَ ٣٢
Wa 'Idhā Qīla 'Inna Wa`da Al-Lahi Ĥaqqun Wa As-Sā`atu Lā Rayba Fīhā Qultum Mā Nadrī Mā As-Sā`atu 'In Nažunnu 'Illā Žannāan Wa Mā Naĥnu Bimustayqinīna
And when it was said, 'Indeed, the promise of Allah is truth and the Hour [is coming] - no doubt about it,' you said, 'We know not what is the Hour. We assume only assumption, and we are not convinced.' "