Critics point to reports of forgotten verses, the Sana'a palimpsest, and Caliph Uthman's standardization of the Quran as evidence that the Quran once existed in competing versions. But the historical evidence does not show the Quran being rewritten. It shows an early period of oral and written transmission, followed by the standardization of the written mushaf while the generation that received the Quran directly from the Prophet (PBUH) was still alive.
What Quran 15:9 actually promises
Indeed, it is We who sent down the Quran, and indeed, We will be its guardian.
Quran 15:9
Preservation does not mean that every private manuscript written by every Muslim throughout history had to be identical, nor that revelation was never written on different materials or recited through more than one authorized mode. The claim is that the Quran revealed to Muhammad (PBUH) was preserved and successfully transmitted to the Muslim community.
Reports of forgotten or abrogated verses
Some hadith mention verses that were abrogated or temporarily forgotten by individuals. These must be distinguished from the claim that part of the Quran was accidentally lost. The Quran recognizes abrogation during the very period of revelation:
We do not abrogate a verse or cause it to be forgotten except that We bring forth one better than it or similar to it.
Quran 2:106
Something intentionally removed from recitation by revelation is not a "lost verse." The Prophet (PBUH) remained the authority who taught his Companions what counted as Quran until his death.
What the Sana'a palimpsest is
In 1972, restoration work at the Great Mosque of Sana'a in Yemen uncovered a large cache of ancient manuscripts hidden between the ceiling and the roof - roughly 12,000 Quranic parchment fragments, later grouped into about 926 different (incomplete) manuscripts. One of them, known as Sana'a 1 (part of it catalogued as DAM 01-27.1), turned out to be a palimpsest: parchment that was written on, washed or scraped clean, and reused. Traces of the erased writing remain visible, so the sheet carries two layers of Quranic text:
| Layer | Description |
|---|---|
| Lower text (scriptio inferior) | The original Quranic writing that was erased. |
| Upper text (scriptio superior) | A standard Uthmanic Quran later written over it. |
Both layers are the Quran. The scholars who studied it, Behnam Sadeghi and Mohsen Goudarzi, concluded each layer likely belonged to a complete codex.
How old is it?
The lower text is exceptionally early. On paleographic grounds it is placed firmly in the seventh century, and radiocarbon testing of one folio gave roughly a 99% probability that the parchment predates 671 CE, 95.5% before 661 CE, and 75% before 646 CE. For perspective, the Prophet (PBUH) died in 632 CE and Uthman became caliph in 644 CE.
Two honest qualifications matter here. First, radiocarbon dating measures the age of the animal parchment, not the ink, so it cannot prove the exact year the text was written. Second, because the lower text contains Surah al-Tawbah (chapter 9), including material traditionally dated to the final years of the Prophet's mission, it cannot have been written substantially before Muhammad (PBUH)'s death in 632 CE. A fair description is simply: the lower Sana'a Quran was produced very early, during or close to the generation of the Companions.
What is different in the lower text?
The differences should not be dismissed as mere spelling, and Muslims do not need to pretend they are. The lower text includes:
- substitution of certain words;
- omission or addition of words and short phrases;
- differences in pronouns, prefixes, and suffixes;
- grammatical and verbal variations;
- changes in word order;
- occasional apparent scribal errors;
- and a different ordering of some surahs.
Yet it must be kept in proportion. The lower codex survives only in fragments, so we cannot inspect its entire original contents. But in the surviving portions we find familiar Quranic surahs and passages, not an alternative scripture with a different prophet, theology, or narrative framework. The variation occurs inside the transmission of the same material.
The strongest objection, stated plainly
The serious version of the objection is not "an old Quran has spelling differences." It is this:
If the Quran was already fixed word-for-word in the Prophet's lifetime, why does such an early manuscript contain additions, omissions, substitutions, and a different surah order? Does this mean several different Qurans existed and Uthman simply chose one?
Does Sana'a show the Quran was rewritten? No
The manuscript fits remarkably well with what Islamic sources themselves already say. Muslim historians never claimed that, before Uthman, every Companion's personal written collection was an identical, mass-produced book. The Quran was carried first and foremost by a living community of reciters and memorizers, while Companions also kept written materials and personal codices. Islamic literature openly records readings and codices associated with Companions such as Abdullah ibn Masud, Ubayy ibn Kab, and Abu Musa al-Ashari - reports that existed for centuries before the Sana'a manuscripts were found.
So Sana'a did not expose a secret history that Muslims had concealed. It provided physical evidence for the existence of early non-Uthmanic textual traditions of the general kind already described in Muslim sources. It should not be over-read: Sana'a 1 cannot simply be identified as the codex of Ibn Masud, Ubayy, or any other named Companion, and one cannot claim each variant is neatly one of the seven ahruf - it attests the reality of such early traditions, not a specific one.
What Uthman actually did
As Islam spread, disputes over recitation began to appear. Hudhayfah ibn al-Yaman, alarmed by differences between Muslims of Iraq and Syria, urged Uthman to act. Uthman obtained the Quranic materials preserved with Hafsah and appointed a committee - Zayd ibn Thabit, Abdullah ibn al-Zubayr, Said ibn al-As, and Abd al-Rahman ibn al-Harith - to produce authoritative copies. Sahih al-Bukhari records his instruction that if they differed with Zayd, they should write it in the dialect of Quraysh. He then distributed the standardized copies and, as Sahih al-Bukhari 4987 states plainly, ordered the other Quranic written materials and codices to be burned. There is no reason to soften that wording - the honest move is to state it directly and then explain why it was done.
None of this was done secretly, centuries later. It happened within the lifetime of the Companions, under a caliph who had personally known the Prophet (PBUH), with leading Companions taking part. The stated aim, in the earliest account, was to keep the community from splitting over the Quran the way earlier communities had split over their scriptures.
Why the other codices were burned
The burning of non-standard codices is sometimes painted as Uthman discovering several contradictory Qurans and destroying the evidence. That goes well beyond what the sources establish. Personal codices could carry different arrangements, readings, spellings, explanatory notes, or variants outside the form chosen for universal written standardization. Once an official mushaf existed, leaving rival private copies in circulation would have defeated the whole purpose - the aim was one shared written reference, not the erasure of a rival scripture. Uthman standardized the written tradition; he did not invent a new Quran.
This is where the manuscript evidence becomes strikingly supportive. The surviving early tradition after this point is overwhelmingly of the Uthmanic text type, and Sadeghi and Goudarzi found that variation within that Uthmanic family is comparatively small. Their conclusion matters: the manuscript record does not show the standard Quran gradually emerging centuries later. The Uthmanic textual tradition was already a distinct and highly stable textual family by around the middle of the seventh century - within decades of the Prophet (PBUH).
What Sana'a actually shows
The manuscript does not support the story of an original Quran, centuries of uncontrolled corruption, and a later reconstruction. The evidence fits a very different sequence:
Revelation to Muhammad (PBUH) -> memorization and written transmission among the Companions -> early personal codices and readings -> Uthmanic standardization during the Companions' own generation -> exceptionally stable written transmission afterward.
The lower Sana'a text is not evidence that someone rebuilt Islam's scripture long after the fact. It belongs to the earliest Islamic period, and the standardization that followed occurred while large numbers of people who had learned the Quran directly from the first generation were still alive.
Conclusion
The Sana'a palimpsest matters precisely because Muslims need not fear manuscript evidence. Its lower text contains genuine variants that should not be waved away as spelling - but acknowledging them does not establish that the Quran was corrupted. It gives a rare physical window onto an early stage of transmission that matches what Islamic sources already described: oral preservation, written materials, Companion codices and readings, then an authoritative written standardization under Uthman. The real question is not whether every private early sheet was identical; it is whether the Quran taught by the Prophet (PBUH) reached the community intact and whether the Uthmanic standard faithfully preserved it. Sana'a does not show otherwise - if anything, sitting beside the extraordinarily stable Uthmanic tradition, it shows how early that standardization happened and how well it held.
For more on how the Quran was compiled and preserved, see the related topics below.
Sources
- Behnam Sadeghi and Mohsen Goudarzi, "Sana'a 1 and the Origins of the Quran," Der Islam 87 (2012) - the study that reports the 1972 discovery, the roughly 12,000 Quranic parchment fragments and their grouping into about 926 manuscripts, the radiocarbon results (99% before 671 CE, 95.5% before 661 CE, 75% before 646 CE), and the analysis of the lower and upper texts and their transmission fidelity.
- Sahih al-Bukhari 4987 - Uthman's standardization of the mushaf and the order that the other Quranic written materials be burned.
- The Institute of Ismaili Studies, "The Sana'a Palimpsest and the Early Manuscripts of the Qur'an" - an accessible overview of the manuscript and its significance.