TABARANI 16473:
from Kaʿb b. ʿUjrah —
[Machine] I was sitting with the Messenger of Allah ﷺ as he was talking to us about trials when a masked man passed by and said, "On this day, he and his companions are on the right path." So, I stood up and followed him, then I removed the mask from his head and it was revealed to be Uthman ibn Affan. I said, "O Messenger of Allah, is this him?" He ﷺ said, "Yes."
الطبراني ١٦٤٧٣:
عن كعب بن عجره —
كُنْتُ جَالِسًا عِنْدَ رَسُولِ اللهِ ﷺ وَهُوَ يُحَدِّثُنَا عَنِ الْفِتَنِ فَمَرَّ رَجُلٌ مُقَنَّعٌ فَقَالَ «هَذَا يَوْمَئِذٍ وَأَصْحَابُهُ عَلَى الْهُدَى» فَقُمْتُ فَلَحِقْتُهُ فَكَشَفْتُ الْقِنَاعَ عَنْ رَأْسِهِ فَإِذَا عُثْمَانُ بْنُ عَفَّانَ قُلْتُ يَا رَسُولَ اللهِ هَذَا؟ قَالَ «نَعَمْ»