`Uthman bin `Affan was afflicted with severe nose-bleeding in the year when such illness was
prevelant and that prevented him from performing Hajj, and (because of it) he made his will. A man
from Quraish came to him and said, "Appoint your successor." `Uthman asked, "Did the people name
him? (i.e. the successor) the man said, "Yes." `Uthman asked, "Who is that?" The man remained
silent. Another man came to `Uthman and I think it was Al-Harith. He also said, "Appoint your
successor." `Uthman asked, "Did the people name him?" The man replied "Yes." `Uthman said, "Who
is that?" The man remained silent. `Uthman said, "Perhaps they have mentioned Az-Zubair?" The man
said, "Yes." `Uthman said, "By Him in Whose Hands my life is, he is the best of them as I know, and
the dearest of them to Allah's Messenger (ﷺ) ."
Sahih al-Bukhari Book 62, Hadith 65
Mujammi' was one of the Quran-reciters (qaris), and he said: We were present with the Messenger of Allah (ﷺ) at al-Hudaybiyyah. When we returned, the people were driving their camels quickly.
The people said to one another: What is the matter with them?
They said: Revelation has come down to the Prophet (ﷺ). We also proceeded with the people, galloping (our camels). We found the Prophet (ﷺ) standing on his riding-animal at Kura' al-Ghamim.
When the people gathered near him, he recited: "Verily We have granted thee a manifest victory.
A man asked: Is this a victory, Messenger of Allah? He replied: Yes. By Him in Whose hands the soul of Muhammad is, this is a victory. Khaybar was divided among those who had been at al-Hudaybiyyah, and the Messenger of Allah (ﷺ) divided it into eighteen portions. The army consisted of one thousand five hundred men, of which three hundred were cavalry, and he gave two shares to a horseman and one to a foot-soldier.
Abu Dawud said: Abu Mu'awiyah's tradition is sounder, and it is one which is followed. I think the error is in the tradition of Mujammi', because he said: "three hundred horsemen." when there were only two hundred.
Sunan Abi Dawud Book 15, Hadith 260