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)
Virtues of the Qur'an - Sahih al-Bukhari 4989
This narration from Zaid ibn Thabit (may Allah be pleased with him) describes the noble undertaking of compiling the Qur'an during the caliphate of Abu Bakr as-Siddiq (may Allah be pleased with him). The wisdom behind this compilation emerged after the Battle of Yamama, where many Qur'an memorizers were martyred, necessitating the preservation of the Divine Revelation in written form.
Zaid's meticulous approach demonstrates the scrupulous care taken in verifying each verse. His finding of the final two verses of Surah at-Tauba exclusively with Khuzaima al-Ansari highlights the rigorous standards of authentication - requiring two witnesses for each revelation, though Khuzaima's testimony was accepted as equivalent to two witnesses due to his recognized integrity.
The verses mentioned (9:128-129) contain profound divine mercy, describing the Prophet's compassionate nature and Allah's endless grace. Their preservation through this method affirms the completeness of the Qur'anic text as we have it today, protected by Allah's promise: "Indeed, it is We who sent down the Qur'an and indeed, We will be its guardian" (15:9).