@mjkhan
again from same article --
The very story of the Quran's collection given in official and authoritative Muslim sources reports the addition of at least one verse. In Sahih Al-Bukhari (the most trusted collection of the Hadith
15) Volume 6, book 61, number 509, it is said that after Muhammad's death there was a battle in which many people who had memorized the Quran had died. The close companions of Muhammad who were leading the Muslim community were concerned that portions of the Quran could be entirely lost if they didn't collect all of the Quran into one written volume. Abu Bakr (the first Caliph, Muhammad's first successor as leader of the Muslim community) sent a man to gather all of the Quran together, saying:
"you should search for (the fragmentary scripts of) the Qur'an and collect it in one book." He began the project of "collecting it from (what was written on) palmed stalks, thin white stones and also from the men who knew it by heart, till I found the last Verse of Surat At-Tauba (Repentance) with Abi Khuzaima Al-Ansari, and I did not find it with anybody other than him."
16
From this work, one official copy of the Quran was produced and remained with Abu Bakr until he died. The very next Hadith in the collection (Volume 6, Book 61, Number 510) explains that by the time of the third Caliph, Uthman, Muslims were reciting the Quran differently from one another so significantly that it threatened to tear the Muslim community apart. Uthman sent for the full copy of the Quran that Abu Bakr had made, and also sent for all the written fragments of Quranic material throughout the land and commissioned a yet another project of collecting the Quran. He ordered the production of a new authoritative edition of the Quran, a copy of which was sent to each province. All the other Quranic material was burned. The hadith ends by noting that a verse had been left out of Abu Bakr's edition that was found and added to Uthman's collection. Once again, this verse was found only with Khuzaima bin Al-Ansari, the same person who had remembered a verse no one else knew the first time the Quran was collected. This official account of the Quran's collection tells us a lot of interesting information, not the least of which is the fact that at least one verse was added to the official written edition of the Quran between the first and second collections. It also tells us that any early version that might have disagreed with this official edition was destroyed.
- 15. the sayings of the Prophet Muhammad and of his companions which are considered scripture by most Muslims
- 16. It is worth noting that if there was one verse by this point that was only remembered by one person and not by anyone else, it seems entirely possible that there were other verses lost by those who had died in the battle or had otherwise forgotten