GodlyVerses

And if We had made it a non-Arabic Qur'an, they would have said, "Why are its verses not explained in detail [in our language]? Is it a foreign [recitation] and an Arab [messenger]?" Say, "It is, for those who believe, a guidance and cure." And those who do not believe - in their ears is deafness, and it is upon them blindness. Those are being called from a distant place. - Quran Fussilat(Explained in Detail) 41:44 (islam)

Alif, Lam, Ra. [This is] a Book whose verses are perfected and then presented in detail from [one who is] Wise and Acquainted. - Quran Hud(Hud) 11:1 (islam)

And We certainly know that they say, "It is only a human being who teaches the Prophet." The tongue of the one they refer to is foreign, and this Qur'an is [in] a clear Arabic language. - Quran An-Nahl(The Bee) 16:103 (islam)

Allah's Messenger (ﷺ) heard a man reciting the Qur'an at night, and said, "May Allah bestow His Mercy on
him, as he has reminded me of such-and-such Verses of such-and-such Suras, which I was caused to
forget." - Hadith Al Bukhari 5038 (islam)
Book 66, Hadith 62
Vol. 6, Book 61, Hadith 558

And We did not send any messenger except [speaking] in the language of his people to state clearly for them, and Allah sends astray [thereby] whom He wills and guides whom He wills. And He is the Exalted in Might, the Wise. - Quran Ibrahim(Abraham) 14:4 (islam)

And We have certainly made the Qur'an easy for remembrance, so is there any who will remember? - Quran Al-Qamar(The Moon) 54:17 (islam)

Then do they not reflect upon the Qur'an? If it had been from [any] other than Allah, they would have found within it much contradiction. - Quran An-Nisa(The Women) 4:82 (islam)

[101]O you who have believed, do not ask about things which, if they are shown to you, will distress you. But if you ask about them while the Qur'an is being revealed, they will be shown to you. Allah has pardoned that which is past; and Allah is Forgiving and Forbearing.
[102]A people asked such [questions] before you; then they became thereby disbelievers. - Quran Al-Ma'idah(The table served) 5:101-102 (islam)

It is He who has sent down to you, [O Muhammad], the Book; in it are verses [that are] precise - they are the foundation of the Book - and others unspecific. As for those in whose hearts is deviation [from truth], they will follow that of it which is unspecific, seeking discord and seeking an interpretation [suitable to them]. And no one knows its [true] interpretation except Allah. But those firm in knowledge say, "We believe in it. All [of it] is from our Lord." And no one will be reminded except those of understanding. - Quran Ali 'Imran(The Family of Imran) 3:7 (islam)

I heard Hisham bin Hakim bin Hizam reciting Surat-al-Furqan in a way different to that of mine.
Allah's Messenger (ﷺ) had taught it to me (in a different way). So, I was about to quarrel with him (during
the prayer) but I waited till he finished, then I tied his garment round his neck and seized him by it and
brought him to Allah's Messenger (ﷺ) and said, "I have heard him reciting Surat-al-Furqan in a way different
to the way you taught it to me." The Prophet (ﷺ) ordered me to release him and asked Hisham to recite it.
When he recited it, Allah s Apostle said, "It was revealed in this way." He then asked me to recite it.
When I recited it, he said, "It was revealed in this way. The Qur'an has been revealed in seven
different ways, so recite it in the way that is easier for you." - Hadith Al Bukhari 2419 (islam)
Book 44, Hadith 9
Vol. 3, Book 41, Hadith 601

And there is no creature on [or within] the earth or bird that flies with its wings except [that they are] communities like you. We have not neglected in the Register a thing. Then unto their Lord they will be gathered. - Quran Al-An'am(The Cattle) 6:38 (islam)

So, [O Muhammad], We have only made Qur'an easy in the Arabic language that you may give good tidings thereby to the righteous and warn thereby a hostile people. - Quran Maryam(Mary) 19:97 (islam)

This is the Book about which there is no doubt, a guidance for those conscious of Allah - Quran Al-Baqarah(The Cow) 2:2 (islam)

Nun. By the pen and what they inscribe, - Quran Al-Qalam(The Pen) 68:1 (islam)