This research was almost the same, but more elaborate to the one posted on June 2017 under the 
INTRODUCTION TO THE GLORIOUS QUR’AN I

The Compilation of the Qur’an
The Holy Qur’an is to the Muslim the Book of Allah the very word of God revealed to the Prophet Muhammad through archangel Gabriel (Jibrail) like the earlier holy books sent for example to David (Da’ud) Moses (Musa) and Jesus (Isa), it is sent for the admonition of mankind as the Qur’an itself testifies. “And assuredly we have made the Qur’an easy for admonition, is there then anyone who would be admonished” (Q54:17). The Qur’an is replete with historical discourse and allusion without being a book of history. The Qur’an is easy for admonition, but no easy in the absolute sense: not easy in the sense that it contains profundities of thought of subtleties of meaning, but it is only easy in so far to lessons of meekness, humility and willing surrender to God and can be deduced from it.
The first revelation of the Qur’an began on the 15th night of the Month of Ramadan in the 41st year after the birth of the Prophet. Its first surah was revealed in the cave Hira when the verse “Recite in the name of thy Lord who created…” was revealed. The last verse of the Qur’an, “This day we have perfected for you your religion…” was revealed on the 9th Dhul Hajja in the 10th year of Hijrah (63rd year of the Prophet’s life). Taking this into consideration we came to know that the period in which the Qur’an was revealed in its entity was twenty two years, two month and twenty-two days.
It is widely accepted as true that at the death of Muhammad, there was not in existence any written collection of revelation of the Qur’an in final form.

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