It is said that Mo would say "these ayats go in this surah after such and such ayats"
http://www.sunnipath.com/Library/Books/B0040P0008.aspxThe Mushaf of Ibn Mas'ud (d. 33/653)
He wrote a mushaf, in which sudras 1, 113 and 114 were not included. Ibn al-Nadim [Fihrist, I, pp. 57-8.] however said he had seen a copy of the Qur'an from Ibn Mas'ud which did not contain al-fatiha (Sura 1). The arrangement of the suras differed from the 'Uthmanic text. The following is the order attributed to Ibn Mas'ud's copy: [Fihrist, I, pp. 53-7.]
2, 4, 3, 7, 6, 5, 10, 9, 16, 11, 12, 17, 21, 23, 26, 37, 33, 28, 24, 8, 19, 29, 30, 36, 25, 22, 13, 34, 35, 14, 38, 47, 31, 35, 40, 43, 41, 46, 45, 44, 48, 57, 59, 32, 50, 65, 49, 67, 64, 63, 62, 61, 72, 71, 58, 60, 66, 55, 53, 51, 52, 54, 69, 56, 68, 79, 70, 73, 74, 83, 80, 76, 75, 77, 78, 81, 82, 88, 87, 92, 89, 85, 84, 96, 90, 93, 94, 86, 100, 107, 101, 98, 91, 95, 104, 105, 106, 102, 97, 110, 108, 109, 111, 112.
This list is obviously incomplete. It contains only 106 suras and not 110, as Ibn Nadim wrote.
In Sura al-baqara, which I take as an example, there are a total of 101 variants. Most of them concern spelling, some also choice of words (synonyms), use of particles, etc.
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Nadim, who lived in the tenth century (4th century Hijra) also added: 'I have seen a number of Qur'anic manuscripts, which the transcribers recorded as manuscripts of Ibn Mas'ud. No two of the Qur'anic copies were in agreement and most of them were on badly effaced parchment ... [Fihrist, I, p. 57.]
This note indicates that the question of authentic manuscripts of Ibn Mas'ud needs to be treated with some caution.
The Mushaf of Ubay bin Ka'b (d. 29 H/649)
He wrote a mushaf, in which two 'additional suras and another 'additional aya' were reportedly found.
[Itqan, I, p. 65; Ibn Abi Dawud, masahif, pp. 18S1; also Noldeke, T. et al.: Geschichte des Qorans, Leipzig, 1909-38 (abbr. as GdQ), 11, pp. 33-8. The first so called sura entitled al-khal' (separation), translates as follows: 'O Allah, we seek your help and ask your forgiveness, and we praise you and we do not disbelieve in you.
We separate from and leave who sins against you.' The second so-called sura, entitled al-hafd (haste) translates as follows: 'O Allah, we worship You and to You we pray and prostrate and to You we run and hasten to serve You. We hope for Your mercy and we fear Your punishment. Your punishment will certainly reach the disbelievers.' Obviously these two pieces constitute so-called 'qunut', i.e. supplications which the Prophet sometimes said in the morning prayer or witr prayer after recitation of suras from the Qur'an. They are in fact identical to some parts of qunut reported in the collections of hadith. See: Nawawi, al-adhkar, Cairo, 1955, pp. 57-8.
As to the single additional so-called aya, its translation is as follows: 'If the son of Adam was given a valley full of riches, he would wish a second one, and if he was given two valleys full of riches, he would surely ask for a third one. Nothing will fill the belly of the son of Adam except dust, and Allah is forgiving to him who is repentant. '
Again this text is known to be a hadith from the Prophet. See Bukhari, VIII, No. 444-47. According to Ibn 'Abbas (No. 445) and 'Ubay (No. 446) this text was at times thought to be part of the Qur'an. However Ubay himself clarifies that after sura 102: I had been revealed, they (i.e. the sahaba) did not consider the above to be part of the Qur'an. See Bukhari, VIII, No. 446. This explanation of Ubay also makes it very clear that the Companions did not differ at all about what was part of the Qur'an and what was not part of the Qur'an. when the revelation had ceased. and if e.g. this hadith occurred in the mushaf of Ubay, it was a mushaf for his own personal use, in other words, his private notebook, where he did not always distinguish between Qur'anic material and hadith, since it was not meant for general use and he himself knew well what to make of his own notes. The same is true of the other copies of the Qur'an, which some of the Companions had for their own personal use. Also those who transmitted to us the reports about these copies of the Qur'an of the Companions have only narrated to us the various differences which occurred there according to reports that reached them (e.g. the hadith in Bukhari, VIII, No. 446 that Ubay at some early stage held this sentence to be part of the Qur'an). However the actual manuscripts of these copies of the Qur'an of the Companions have not come down to us, since all of them agreed on the correctness and validity of the copies which 'Uthman had arranged to be written and distributed for general use. Hence their own personal notebooks became obsolete and were destroyed.]The order of the suras is again different from 'Uthman as well as Ibn Masud.
The following is the order of suras in the copy attributed to Ubay b. Ka'b: [Fihrist, I, pp. 58-60.]
1, 2, 4, 3, 6, 7, 5, 10, 8, 9, 11, 19, 26, 22, 12, 18, 16, 33, 17, 39, 45, 20, 21, 24, 23, 40, 13, 28, 27, 37, 38, 36, 15, 42, 30, 43, 41, 14, 35, 48, 47, 57, 52, 25, 32, 71, 46, 50, 55, 56, 72, 53, 68, 69, 59, 60, 77, 78, 76, 75, 81, 79, 80, 83, 84, 95, 96, 49, 63, 62, 66, 89, 67, 92, 82, 91, 85, 86, 87, 88, 74?, 98?, 61, 93, 94, 101, 102, 65?, 104, 99, 100, 105, ?, 108, 97, 109, 110, 111, 106, 112, 113, 114.
Again, as in the case of Ibn Mas'ud above this list is incomplete and does not contain all 114 suras of the Qur'an.
'Ubay has a total of 93 variants in Sura al-baqara. [Again taken as example only to illustrate the point.] Very often, his readings are similar to those of Ibn Mas'ud. For example, he reads al-baqara in 2:70 as al-baqira. So does Ibn Mas'ud.
Talking about the letters at the beginning of Suras, he quotes Goossens for thinking that the "Mystic letters" (حروف مقطعة) are abbreviations for previous names of the surahs.