Merits of the Helpers in Madinah (Ansaar)

Bukhari :: Book 5 :: Volume 58 :: Hadith 150

Narrated 'Abdullah bin 'Amr:

I heard the Prophet saying, "Learn the recitation of Qur'an from four persons: Ibn Mas'ud, Salim, the freed slave of Abu Hudhaifa, Ubai and Muadh bin Jabal."