إِنَّا أَنْزَلْنَاهُ قُرْآنًا عَرَبِيًّا
We have sent it down as an Arabic Qur’an. (Yūsuf 12:2)
“Arabic” plainly describes the linguistic expression familiar to Arabic speakers: the revealed wording by which the message is understood and recited. The temporality of human linguistic expression, however, does not by itself refute the eternity of inner speech.
Conversely, eternity of divine speech does not make each sound uttered by a human reader eternal. The relationship of Arabic arrangement, meaning and the divine attribute must be preserved without assigning identical predicates to each.