Sahih Bukhari Volume 9, Book 93, Hadith Number 521.

Narrated By Zaid bin Thabit : Abu Bakr sent for me, so I collected the Qur’an till I found the last part of Surat-at-Tauba with Abi Khuzaima Al-Ansari and did not find it with anybody else. (The Verses are): ‘Verily, there has come to you an Apostle (Muhammad) from amongst yourselves… (till the end of Surat Bara’a) (i.e., At-Tauba).’ (9.128-129)