Sahih Bukhari | Volume 5 | Hadith Number 155

Narrated by Qatada
Anas said, "The Qur'an was collected in the lifetime of the Prophet by four (men), all of whom were from the Ansar: Ubai, Muadh bin Jabal, Abu Zaid and Zaid bin Thabit." I asked Anas, "Who is Abu Zaid?" He said, "One of my uncles."