1. Prophet Muhammad (pbuh) himself supervised and authenticated the written texts of the Qur’an
Whenever the Prophet received a revelation, he would first memorize it himself and later declare the revelation and instruct his Companions (R.A. – Radhi Allahu Taala Anhu) – May Allah be pleased with him who would also memorize it. The Prophet would immediately ask the scribes to write down the revelation he had received, and he would reconfirm and recheck it himself. Prophet Muhammad (pbuh) was an Ummi who could not read and write. Therefore, after receiving each revelation, he would repeat it to his Companions. They would write down the revelation, and he would recheck by asking them to read what they had written. If there was any mistake, the Prophet would immediately point it out and have it corrected and rechecked. Similarly he would even recheck and authenticate the portions of the Qur’an memorized by the Companions. In this way, the complete Qur’an was written down under the personal supervision of the prophet (pbuh).
2. Order and sequence of Qur’an divinely inspired
The complete Qur’an was revealed over a period of 22½ years portion by portion, as and when it was required. The Qur’an was not compiled by the Prophet in the chronological order of revelation. The order and sequence of the Qur’an too was Divinely inspired and was instructed to the Prophet by Allah (swt) through archangel Jibraeel. Whenever a revelation was conveyed to his companions, the Prophet would also mention in which surah (chapter) and after which ayat (verse) this new revelation should fit.
Every Ramadhaan all the portions of the Qur’an that had been revealed, including the order of the verses, were revised and reconfirmed by the Prophet with archangel Jibraeel. During the last Ramadhaan, before the demise of the Prophet, the Qur’an was rechecked and reconfirmed twice.
It is therefore clearly evident that the Qur’an was compiled and authenticated by the Prophet himself during his lifetime, both in the written form as well as in the memory of several of his Companions.
3. Qur’an copied on one common material
The complete Qur’an, along with the correct sequence of the verses, was present during the time of the Prophet (pbuh). The verses however, were written on separate pieces, scrapes of leather, thin flat stones, leaflets, palm branches, shoulder blades, etc. After the demise of the prophet, Abu Bakr (r.a.), the first caliph of Islam ordered that the Qur’an be copied from the various different materials on to a common material and place, which was in the shape of sheets. These were tied with strings so that nothing of the compilation was lost.