Uthmān ibn Ḥunayf (Arabic: عثمان بن حنيف) was a companion of the Islamic prophet Muhammad. According to Shia belief, he did not give allegiance to Abu Bakr, until Ali supposedly did so.Peshawar Nights on Al-Islam.org He narrated the Hadith of the blind man.Islam Tomorrow .com
Qadi Yusuf says that Uthman ibn Hunayf was an authority in all Arabia on taxation, assessment of land revenue and land reclamation. He was employed by Umar as a land revenue expert.A Restatement of the History of Islam and Muslims on Al-Islam.org , referencing Kitabul-Kharaj and Siyar-ul-Ansar
He was appointed governor of Basra by Ali.
References