The era/ moment of the Emergence [of Imam Mahdi (hgr)] in Qur’an
فلَمَّا نَسُوا مَا ذُكِّرُوا بِهِ فَتَحْنَا عَلَيْهِمْ أَبْوَابَ كُلِّ شَيْءٍ حَتَّى إِذَا فَرِحُوا بِمَا أُوتُوا أَخَذْنَاهُمْ بَغْتَةً فَإِذَا هُمْ مُبْلِسُونَ [انعام/۴۴]
Translation:
But when they forgot the warning they had received,
We opened to them the gates of all (good) things,