I heard ‘Uthman (رضي الله عنه) delivering a khutbah from the minbar. He said: I used to buy dates from one of the Jewish clans who were called Banu Qainuqa`, and sell them at a profit. News of that reached the Messenger of Allah (ﷺ) who said: `O `Uthman, when you buy, take your dues with nothing extra, and when you sell, give (the other party`s) dues with nothing less.`
Narrated It was narrated that Abu Salih, the freed slave of `Uthman bin `Affan (رضي الله عنه) said:
I heard `Uthman (رضي الله عنه) say on the minbar: O people, I concealed from you a hadeeth that I heard from the Messenger of Allah (ﷺ) for fear that you would scatter away from me, then I thought that I should tell it to you, and let each one choose for himself what he thinks is best. I heard the Messenger of Allah (ﷺ) say: `Guarding the border for one day for the sake of Allah is better than a thousand other days doing other deeds.”
`Abdullah bin ‘Abdur-Rahman bin Abi Dhubab narrated... A similar hadeeth]
Narrated `Ubaidullah bin `Adiyy bin al-Khiyar narrated that `Uthman (رضي الله عنه) said to him:
Verily Allah, may He be glorified and exalted, sent Muhammad (ﷺ) with the truth and I was one of those who responded to (the call of) Allah and His Messenger, and I believed in that with which Muhammad (ﷺ) was sent. Then I migrated twice, and I also attained the honour of becoming the son-in-law of the Messenger of Allah (ﷺ); I swore allegiance to the Messenger of Allah (ﷺ), and by Allah, I never disobeyed him or betrayed him until Allah, may He be glorified and exalted, took his soul in death.
I said to ‘AbdurRahman bin ‘Awf: How could you swear allegiance to ‘Uthman (رضي الله عنه) and not to `Ali (رضي الله عنه)? He said: It is not my fault. I started with `Ali and said: I swear allegiance to you in accordance with the Book of Allah, the Sunnah of His Messenger, and the way of Abu Bakr and ʼUmar (رضي الله عنهما) . He said: As much as I can. Then I offered it to `Uthman (رضي الله عنه) and he accepted it.