The Noble Quran is the eternal miracle of the Prophet Muhammad because all the miracles of the Prophets, may Allah exalt their mention, ended with their death, except our Prophet whose miracle is still preserved. This everlasting miracle is The Book of Allah and His Revealed Speech that {Falsehood cannot approach it from before it or from behind it} [Quran 41:42]

Allah, the Almighty, Confirms this fact, when He Says (what means):

• {And if any one of the polytheists seeks your protection, then grant him protection so that he may hear the Words of Allah} [Quran 9:6]

• {Those who remained behind will say when you set out toward the war booty to take it, "Let us follow you." They wish to change the Words of Allah} [Quran 48:15]

Those two verses prove that the Quran is the Words and Speech of Allah, the Almighty, that He Has Revealed to His Prophet Muhammad . Jabir Ibn ‘Abdullah reported that the Prophet used to invite people to Islam during the Hajj season and would say, “Who are willing to give me asylum so that I can convey the Speech of my Lord, for the Quraysh have prevented me from conveying the Speech of my Lord.” [Imam At-Tirmithi and Imam Ahmad]
Hence, the Quran is the Speech of Allah as unanimously agreed upon by all Muslims.

This fact is supported by several logical and tangible pieces of evidence including the following:

- The polytheists failed to produce a single verse, let alone a single Chapter, or a whole book like the Quran despite the fact that they were utterly determined and extremely motivated to oppose and falsify the call of the Prophet . Furthermore, we must remember that they were the masters of the Arabic language, in which the Quran was revealed. Certainly, this constitutes a definitive proof that the Quran is the Speech of Allah, The Lord of The Worlds, not that of humans.

- The Quran foretold many matters of the unseen and made several prophecies that were all fulfilled exactly as they were foretold. For example, the Persians defeated the Byzantines in one of their battles and the Quran recorded this defeat foretelling that the Byzantines would defeat the Persians within three to nine years and this is what actually happened. Allah, the Exalted, Says (what means): {The Byzantines have been defeated - In the nearest land. But they, after their defeat, will overcome - Within three to nine years} [Quran 30: 2-4]

- The Quran includes many miraculous scientific facts that were only discovered fourteen centuries later. For example, the Quran told us about a barrier separating the salty water from the fresh water not to mix with each other. Allah, the Exalted, Says (what means): {He Released the two seas, meeting [side by side]; Between them is a barrier [so] neither of them transgresses} [Quran 55:19- 20]
After about fourteen centuries, modern science confirmed this scientific fact.

- When one reads the Book of Allah, he goes into a state of peace and tranquility unlike the human speeches or writings. Allah, the Exalted, Says (what means): {Those who have believed and whose hearts are assured by the remembrance of Allah. Unquestionably, by the remembrance of Allah hearts are assured} [Quran 13:28]

- The Quran is also a cure and it expels the devils when it is recited. Allah, the Almighty, Says (what means): {And We send down of the Quran that which is healing and mercy for the believers...} [Quran 17:82]

Of course, it is almost impossible to list all the evidences that prove that the Quran is the Speech of Allah in this article; however, we will conclude with the words of Al-Waleed Ibn Al-Mugheerah, who was one of the senior leaders of the polytheists of Quraysh, about the Quran. He said, “What can I say? Whether it is about prose or poetry, or the poems of the Jinns, I possess greater knowledge than any other man. By God! The words spoken by this man cannot be compared with any of the others. By God, his words possess a charming sweetness and a particular beauty. The branches of his speech are laden with fruit while its roots are firmly entrenched in the soil from whence it proceeds. It is superior to all other discourses, and it is not possible for any other discourse to show it in poor light. For a surety it will conquer anything that comes under its own influence!” [Al-Hakim and Al-Bayhaqi]

This is the Quran, the Speech of Allah that has been challenging humankind and proving its inability to produce something to its effect as to its eloquence, wise judgments, and authentic news. The challenge is still valid, and the inability of mankind to face that challenge remains. Thus, the Quran will remain the everlasting Argument of Allah, the Almighty, against all opponents and disbelievers.