Some think this is controversial but since a possible date is a decade afte=
r Muhammad's death I don't see a problem. Or maybe even written down in his=
own lifetime. It just means a much earlier copy of part of the Qur'an tha=
n had been thought before. This means there is a partial manuscript of the=
Muslim holy book dated earlier than compared to the Christian Bible.
https://en.wikipedia.org/wiki/Birmingham_Quran_manuscript