(4) باب كَاتِبِ النَّبِيِّ صلى الله عليه وسلم
Narrated Zaid bin Thabit:
Abu Bakr sent for me and said, "You used to write the Divine Revelations for Allah's Messenger (ﷺ) : So you should search for (the Qur'an and collect) it." I started searching for the Qur'an till I found the last two Verses of Surat at-Tauba with Abi Khuza`ima Al-Ansari and I could not find these Verses with anybody other than him. (They were): 'Verily there has come unto you an Apostle (Muhammad) from amongst yourselves. It grieves him that you should receive any injury or difficulty ...' (9.128-129)
Reference: Sahih al-Bukhari 4989
In-book reference: Book 66, Hadith 11
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 6, Book 61, Hadith 511