Arabs vs. ‘Aarabs

2:151 (Blessings) such as the sending of a messenger from among you to recite our revelations to you, purify you, teach you the scripture and wisdom, and to teach you what you never knew.

كَمَآ أَرْسَلْنَا فِيكُمْ رَسُولًا مِّنكُمْ يَتْلُوا۟ عَلَيْكُمْ ءَايَـٰتِنَا وَيُزَكِّيكُمْ وَيُعَلِّمُكُمُ ٱلْكِتَـٰبَ وَٱلْحِكْمَةَ وَيُعَلِّمُكُم مَّا لَمْ تَكُونُوا۟ تَعْلَمُونَ

7:35 O children of Adam, when messengers come to you from among you, and recite My revelations to you, those who take heed and lead a righteous life, will have nothing to fear, nor will they grieve.

يَـٰبَنِىٓ ءَادَمَ إِمَّا يَأْتِيَنَّكُمْ رُسُلٌ مِّنكُمْ يَقُصُّونَ عَلَيْكُمْ ءَايَـٰتِى فَمَنِ ٱتَّقَىٰ وَأَصْلَحَ فَلَا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ

Therefore, if the A’rabs are the people whose language most aligns with the Quran, and messengers are sent from among their own people to preach in their native tongue, then Muhammad and the earliest Muslims were all A’rabs. This is why the Quran does not use the term Arab ( ٱلْعْرَب), only A’rab ( ٱلْأَعْرَاب), in reference to all the prophet preached to.