The Quran has been memorized
Because God saved the Quran from changing
The predicate is connected
And the writers of the Quran are known generation after generation

If one refers to the teachings of the Quran, he descended directly on Muhammad through the intermediary of the Angel Gabriel (Jibril in Arabic), who received him from Almighty God (Allah) and who then recited to Muhammad, fragment by fragment, verse by verse, thus revealing small and large parts over a period of 23 years.

The assembly and order of verses that we know today have never been altered by Muhammad. It was Jibril, the Angel of Allah, who gave the instructions on how to order the verses with each revelation of the Quran.

"If Muhammad could not read or write, then his friends had to write the Quran (like the Bible), right? "

NO ! Again, they didn't have to write it down to keep it, even though they did. They all memorized it completely after hearing it.

Some of them wrote it on animal skins, others on large stones or palm leaves, because the Prophet Muhammad had asked them to do so.

So, they wrote down what they heard and this is the written form of the Quran. They all memorized the Quran for themselves and transmitted it the same way they received it.

The “word of mouth” method of memorizing is still in effect among Muslims today.

"Could they have misinterpreted or is it possible that they modified, added or deleted verses from the Quran? "

No, Allah tells us in the Koran itself: "If you doubt it, bring a similar book". So we see that, yes, it is a book. But this is no ordinary book, written by humans, and that's what we need to remember here.

Now is your opportunity to verify your statements, just as the Quran itself authenticates its statements:

The strongest evidence that the Quran is not (and will not be) distorted is that Allaah The Exalted challenged His creation to produce the likes of it; then He challenged them to produce ten chapters only and finally challenged them to produce even a single chapter. Today, this challenge remains open. If the Quran is fabricated, why can they not even produce a single chapter and defeat their enemy?

So far, no one has been able to produce anything close to the Qur'an in its beauty, style, meaning and prophecies. Scientific evidence makes the Qur'an the most talked about book in today's intellectual world.

1,500-year-old Quran manuscript may be oldest known copy

Recently radiocarbon dated copy of the 7th century Quran at the University of Birmingham.

A 1,500-year-old parchment may be one of the oldest known copies of the Quran, possibly dating to a time that straddled the life of the Prophet Muhammad, according to researchers who recently dated the fragments of the manuscript.

The text was radiocarbon dated, which measured the age of organic materials from the find. Researchers at the University of Birmingham, UK, found that the sheets of parchment dated back to AD 568 and AD 645.

Susan Worrall, director of special collections at the University of Birmingham, said in a statement.
"Radiocarbon dating has delivered an exciting result, which contributes significantly to our understanding of the earliest written copies of the Quran",

The Prophet Muhammad is said to have lived between AD 570 and 632 and, according to Muslim tradition, he received the revelations that make up the Quran between AD 610 and 632.


"The above observation makes the hypothesis advanced by those who see Muhammad as the author of the Qur'an untenable. How could a man, from being illiterate, become the most important author, in terms of literary merits, in the whole of Arabic literature? How could he then pronounce truths of a scientific nature that no other human being could possibly have developed at that time, and all this without once making the slightest error in his pronouncement on the subject?"
Maurice Bucaille, THE BIBLE, THE QUR'AN AND SCIENCE, 1978, p. 125.

كيف تم حفظ القرآن؟ - إيبيستيميكس 9 مع عدنان رشيد
https://www.youtube.com/watch?v=20pcjxfpe9U

Scientists confirm the authenticity of the Qur’an

Oldest version of the Quran at the University of Birmingham - YouTube

https://www.youtube.com/watch?v=XUSLHTqYWmE