Since the time it was revealed, Allah has preserved the Quran
in the hearts of the people and in writing. It had been committed
to memory by the Companions and by every generation that came
after them. The care paid by the Muslims in accurately recording
and memorizing the Quran has been phenomenal. Every letter and
vowel mark indicating every mode of reciting the Quran has been
preserved without the least addition or subtraction.
Al-Qurtubi and some other scholars of Quranic commentary mention
an interesting story regarding the preservation of the Quran:
The Caliph al-Mamun used to arrange intellectual gatherings.
One of these meetings was attended by a man wearing beautiful
clothing, possessing a handsome face, and followed by a sweet
fragrance. He spoke in a most eloquent manner. When the meeting
was adjourned, al-Mamun summoned this man and asked him: “Are
you from the Israelites?” He replied that he was. Al-Mamun
said: “Accept Islam and I shall arrange good things for
you.” Al-Mamun made him a number of promises.
The man merely replied “My religion and the religion of
my forefathers” and went away. A year later, he returned
as a Muslim. He spoke about matters of Islamic Law in a most proficient
manner. When the meeting was adjourned, al-Mamun again summoned
him and said: “Are you not the man who was with us before?”
He replied that he was. Al- Mamun then asked him what had prompted
him to accept Islam.
He replied: “When I left your presence, I wished to put
these religions to the test. And you indeed regard me a man of
keen intellect. So I turned my attention to the Torah. I produced
three copies of it, each time adding and deleting some things
from it. Then I took these copies to the place of prayer and they
were purchased from me.
“I then turned my attention to the Gospel and drafted three
copies of it, each time adding and deleting some things from it.
Then I took these copies to the church and they were purchased
from me.
“I then turned my attention to the Quran and drafted three
copies of it, each time adding and deleting some things from it.
Then I took these copies to the copyists and they skimmed through
them. When they found the additions and deletions that I had made,
they threw them aside and did not purchase them. So I came to
know that this is a protected book, and this is the reason that
I accepted Islam.”