Arabic is mentioned in the Quran in these verses:

[12:2] We have revealed it an Arabic Quran, that you may understand.

[13:37] We revealed these laws in Arabic, and if you ever acquiesce to their wishes, after this knowledge has come to you, you will have no ally, nor a protector, against God.

[16:103] We are fully aware that they say, “A human being is teaching him!” The tongue of the source they hint at is non-Arabic, and this is a perfect Arabic tongue.

[20:113] We thus revealed it, an Arabic Quran, and we cited in it all kinds of prophecies, that they may be saved, or it may cause them to take heed.

[26:192] This is a revelation from the Lord of the universe.

[26:193] The Honest Spirit (Gabriel) came down with it.

[26:194] To reveal it into your heart, that you may be one of the warners.

[26:195] In a perfect Arabic tongue.

[26:198] If we revealed this to people who do not know Arabic.

[26:199] And had him recite it (in Arabic), they could not possibly believe in it.

[39:28] An Arabic Quran, without any ambiguity, that they may be righteous.

[41:3] A scripture whose verses provide the complete details, in an Arabic Quran, for people who know.

[41:44] If we made it a non-Arabic Quran they would have said, “Why did it come down in that language?” Whether it is Arabic or non-Arabic, say, “For those who believe, it is a guide and healing. As for those who disbelieve, they will be deaf and blind to it, as if they are being addressed from faraway.”

[42:7] We thus reveal to you an Arabic Quran to warn the central community and all around it, and to warn about the Day of Summoning that is inevitable. Some will end up in Heaven, and some in Hell.

[43:3] We have rendered it an Arabic Quran, that you may understand.

[46:12] Before this, the book of Moses provided guidance and mercy. This too is a scripture that confirms, in Arabic, to warn those who transgressed, and to give good news to the righteous.

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