The Prophets - 21:97
"The fulfillment of the Word of truth has come near, and the eyes of the disbelievers have been filled with fear: "Woe to us, we were heedless of this, we were indeed the wrongdoers."
The true word; The hour/end of the world:
The Kneeling/45:32
"When they were told that the Word of Allah is a truth and that the Hour is an inevitable event, you used to say: "We do not know what the Hour is, we only have various conjectures and we have no certain knowledge about it"."