Arabic in written form is not very old. The list of written languages older than Arabic is extremely long. A list would include Chinese, Persian, Assyrian, Latin, Greek, and Hindi, to name just a few. The Q'uran was written in the Seventh Century, only 1300 years ago. Writings in the ancient Kemetic Egyptian language were already thousands of years old at that point. Classical Greek in written form is almost as ancient, as is Chinese. The Q'uran is the most recent of the three tradiditional Holy Books. The New Testament of Christianity is several hundred years older than the Q'uran, and parts of the Hebrew Bible are much, much older. Muhammad was familiar with both the Christian and Hebrew Testaments, and regarded his own teachings as the third and final divine revelation.