Uthman ibn Hunaif was one of the companions of Muhammad

Sahaba

In Islam, the ' were the companions, disciples, scribes and family of the Islamic prophet...

. According to Shia belief, he did not give allegiance to Abu Bakr

Abu Bakr

Abu Bakr was a senior companion and the father-in-law of the Islamic prophet Muhammad. He ruled over the Rashidun Caliphate from 632-634 CE when he became the first Muslim Caliph following Muhammad's death...

, until Ali

Ali

' |Ramaḍān]], 40 AH; approximately October 23, 598 or 600 or March 17, 599 – January 27, 661).His father's name was Abu Talib. Ali was also the cousin and son-in-law of the Islamic prophet Muhammad, and ruled over the Islamic Caliphate from 656 to 661, and was the first male convert to Islam...

 supposedly did so. He narrated the Hadith of the blind man.

Qadi Yusuf says that Uthman bin Hunaif was an authority in all Arabia on taxation, assessment of land revenue and land reclamation. He was employed by Umar

Umar

`Umar ibn al-Khattāb c. 2 November , was a leading companion and adviser to the Islamic prophet Muhammad who later became the second Muslim Caliph after Muhammad's death....

 as a land revenue expert, the Umar

Umar

`Umar ibn al-Khattāb c. 2 November , was a leading companion and adviser to the Islamic prophet Muhammad who later became the second Muslim Caliph after Muhammad's death....

and the Sahaba