According to search-discovered classical Islamic scholarship, the term 'An-Nabi al-Ummi' (ٱلنَّبِىُّ ٱلْأُمِّىُّ), mentioned explicitly in the Quran in verses 7:157-158, refers to the Prophet Muhammad ﷺ as 'the unlettered Prophet.' Ibn Kathir's tafsir clarifies that this means he could neither read nor write, a state that serves as one of the most powerful proofs of his prophethood. This divine attribute, prophesied in previous scriptures, demonstrates irrefutably that the unparalleled eloquence and profound knowledge contained within the Quran could not have been of human origin. Al-Tabari's linguistic analysis of 'Ummi' supports this primary meaning, connecting it to one's natural, untaught state. The synthesis across the key verses establishes that Allah sent an unlettered messenger to an unlettered people (62:2) to make the miracle of the divine revelation manifest and to remove all doubt about its source being Allah Himself. This attribute is thus central to the Islamic creed, underpinning the divine authenticity of the Quranic message.