Indeed, we have sent it down as an Arabic Qur'an that you might understand.

Surah Yusuf        12, 2       (Sahih International)

Indeed, we have sent it down as an Arabic Qur'an that you might understand.

The Holy Qur'an is supposed to have had been successively revealed from Allah through the angel Jabreel (Gabriel) to the Prophet Muhammad (pbuh) in Arabia during the 7th Century A.D., and this over the course of 23 years. The descent of the Holy Quran verse by verse in Arabic made Mohammed (pbuh) a Messenger and Warner for Mecca and the surrounding desert areas. It was first memorized by his first faithful Muslims, and then written down on leaves, bones, stones, which were collected after Muhammad's (pbuh) death under Abu Bakar, and later unified and re-edited by Uthman. The process of collection of 114 suras and literal codification to a common canon took a 12 years time. Then they were copied a 5 to 10 times and distributed into the corners of the Muslim world.

link: online; Qur'an

In the beginning of the Qur'an: "THE MESSAGE" (movie) 15 min.

In terms of volume, the Bible is with about 780,000 words ten times the size of the Qur’an with its 78,000 words just about 10%. So while it took almost 2000 years for the Bible to be completed it took 23 years only for the Qur’an.

Dr, Quraishi (Historian) on the Holy Qur'an collection & codification

Surah Al – Isra  17:105    (Sahih International)

And with the truth we have sent the Qur'an down, and with the truth it has descended. And we have not sent you, [O Muhammad], except as a bringer of good tidings and a Warner.

 Its message logically in Arabic was originally for the people of Mecca, and its surrounding Arab tribes, who had been idol worshipers for centuries. Its content in their mother tongue was a clear warning from hell fire and an admonition to get ready for the judgment day. The basic message, the good news was that God is one and therefore the Arabs too were warned, like Jews and Christians, not to worship idols any longer. Mohammed, son of Abdullah was the new messenger of God first for the Arab tribes.

Surah Ash – Shuraa         42, 7       (Dr. Ghali)

And thus we have revealed to you an Arabic Qur’an that you may warn the Mother of the Towns (Makah) and whomever are dwelling around it, and to warn of the Day of Gathering, wherein there is no suspicion: a group in the Garden, and a group in the Blaze.

Qur'an  means: "Recitation" or “Collection”. 

Shortly after Muhammad's (pbuh) death it was compiled and codified into a single written Arabic version, which remains the standard until today. Please notice that the original actual manuscript is not present anywhere, but all are accurate copies.  This very Qur’an was really meant to confirm the earlier books, the Tawrat, Zaboor and Injil, which were not available in the Arabic language at that time, not until two centuries later.

One of the oldest Arabic bibles was discovered in the 19th century at Saint Catherine’s Monastery, Mount Sinai, Egypt. The manuscript called Mt. Sinai Arabic Codex 151, dates back to in AD 867, which is about 200 years after the first copy of the Qur'an was compiled and distributed.