The Prophet (ﷺ) said to Ubai, "Allah has ordered me to recite to you: 'Those who disbelieve (Surat-al- Bayina 98).' " Ubai said, "Has He mentioned my name?" The Prophet (ﷺ) said, "Yes." On hearing this, Ubai started weeping.
Sahih al-Bukhari Book 63, Hadith 34
← Previous Hadith `Abdullah bin Masud was mentioned before `Abdullah bin `Amr who said, "That is a man I still love, as I heard the Prophet (ﷺ) saying 'Learn the recitation of Qur'an from four from `Abdullah bin Mas`ud -- he started with him--Salim, the freed slave of Abu Hudaifa, Mu`adh bin Jabal and Ubai bin Ka`b."

Sahih al-Bukhari Book 63, Hadith 33 Next Hadith → Anas said, "The Qur'an was collected in the lifetime of the Prophet (ﷺ) by four (men), all of whom were from the Ansar: Ubai, Mu`adh bin Jabal, Abu Zaid and Zaid bin Thabit." I asked Anas, "Who is Abu Zaid?" He said, "One of my uncles."

Sahih al-Bukhari Book 63, Hadith 35