Muhammad and illiteracy

7:155 "And Moses chose from his people seventy men for Our appointment. And when the earthquake seized them, he said, "My Lord, if You had willed, You could have destroyed them before and me [as well]. Would You destroy us for what the foolish among us have done? This is not but Your trial by which You send astray whom You will and guide whom You will. You are our Protector, so forgive us and have mercy upon us; and You are the best of forgivers."

7:156 "And decree for us in this world [that which is] good and [also] in the Hereafter; indeed, we have turned back to You." [ Allah ] said, "My punishment - I afflict with it whom I will, but My mercy encompasses all things." So I will decree it [especially] for those who fear Me and give zakah and those who believe in Our verses -"

7:157 "Those who follow the Messenger, the unlettered (الْأُمِّيَّ, al-ummiy) prophet, whom they find written in what they have of the Torah and the Gospel, who enjoins upon them what is right and forbids them what is wrong and makes lawful for them the good things and prohibits for them the evil and relieves them of their burden and the shackles which were upon them. So they who have believed in him, honored him, supported him and followed the light which was sent down with him - it is those who will be the successful."

7:158 "Say, [O Muhammad], "O mankind, indeed I am the Messenger of Allah to you all, [from Him] to whom belongs the dominion of the heavens and the earth. There is no deity except Him; He gives life and causes death." So believe in Allah and His Messenger, the unlettered (الْأُمِّيِّ, al-ummiy) prophet, who believes in Allah and His words, and follow him that you may be guided."

7:159 "And among the people of Moses is a community which guides by truth and by it establishes justice."

(Those who follow the Messenger, the Prophet who can neither read nor write whom they find written with them in the Tawrah and the Injil,) This is the description of the Prophet Muhammad in the Books of the Prophets. They delivered the good news of his advent to their nations and commanded them to follow him. His descriptions were still apparent in their Books, as the rabbis and the priests well know.

"The book shall be given to a person who is not learned. And when will be asked "Read this!", he will say "I am not learned".

...suddenly the Truth descended upon him while he was in the cave of Hira. The angel came to him and asked him to read. The Prophet (ﷺ) replied, "I do not know how to read."...

29:11 "For you this whole vision is nothing but words sealed in a scroll. And if you give the scroll to someone who can read, and say, “Read this, please,” they will answer, “I can’t; it is sealed.”"

29:12 "Or if you give the scroll to someone who cannot read, and say, “Read this, please,” they will answer, “I don’t know how to read.”"

29:13 "The Lord says: “These people come near to me with their mouth and honor me with their lips, but their hearts are far from me. Their worship of me is based on merely human rules they have been taught."

And among them are unlettered ones (أُمِّيُّونَ, ummeeoona) who do not know the Scripture except in wishful thinking, but they are only assuming.

And there are some of them the Jews that are illiterate unlettered not knowing the Scripture the Torah but only desires lies which were handed down to them by their leaders and which they relied upon; and in their rejection of the prophethood of the Prophet and fabrications of other matters they have mere conjectures and no firm knowledge.

So if they argue with you, say, "I have submitted myself to Allah [in Islam], and [so have] those who follow me." And say to those who were given the Scripture and [to] the unlearned (وَالْأُمِّيِّينَ, wa-al-ummeena), "Have you submitted yourselves?" And if they submit [in Islam], they are rightly guided; but if they turn away - then upon you is only the [duty of] notification. And Allah is Seeing of [His] servants.

So if they the disbelievers dispute with you O Muhammad (s) concerning religion say to them ‘I have surrendered my countenance to God that is to say I have submitted to Him I and whoever follows me’ wajh ‘countenance’ is chosen here because of its noble character for the other parts of the body will just as soon surrender once the countenance has; and say to those who have been given the Scripture the Jews and the Christians and to the uninstructed the Arab idolaters ‘Have you submitted?’ that is to say ‘Submit!’ And so if they have submitted they have been guided from error but if they turn their backs to Islam your duty is only to deliver the Message; and God sees His servants and so requites them for their deeds — this statement was revealed before the command to fight them had been revealed.

And among the People of the Scripture is he who, if you entrust him with a great amount [of wealth], he will return it to you. And among them is he who, if you entrust him with a [single] silver coin, he will not return it to you unless you are constantly standing over him [demanding it]. That is because they say, "There is no blame upon us concerning the unlearned (الْأُمِّيِّينَ, al-ummeena)." And they speak untruth about Allah while they know [it].

And of the People of the Scripture is he who if you trust him with a hundredweight that is with much money he will return it to you on account of his trustworthiness the like of ‘Abd Allāh b. Salām to whom a man entrusted 1200 plates of gold which he then returned to him; and of them is he who if you trust him with one dinar will not return it to you on account of his treachery; unless you keep standing over him not leaving him for one minute for as soon as you leave him he will deny it as was the case with Ka‘b b. al-Ashraf to whom a man from Quraysh entrusted a dinar and later denied it. That refusal to return things is because they say ‘We have no duty towards namely no possibility of acquiring sin because of the Gentiles’ the Arabs; for they considered it lawful to be unjust towards any person of a different religion and they attributed the source of this conviction to God exalted be He. God exalted be He says They speak falsehood against God by attributing such things to Him while they are aware that they are liars.

62:2 "It is He who has sent among the unlettered (الْأُمِّيِّينَ, al-ummeen) a Messenger from themselves reciting to them His verses and purifying them and teaching them the Book and wisdom - although they were before in clear error -"

62:3 "And [to] others of them who have not yet joined them. And He is the Exalted in Might, the Wise."

It is He Who sent to the unlettered folk among the Arabs ummī means ‘one who cannot write or read a book’ a messenger from among them namely Muhammad (s) to recite to them His signs the Qur’ān and to purify them to cleanse them from idolatry and to teach them the Book the Qur’ān and wisdom in the rulings that it contains though indeed wa-in in has been softened from the hardened form with its subject having been omitted that is to say understand it as wa-innahum before that before his coming they had been in manifest error.

The Prophet explained Allah's statement,

﴿وَءَاخَرِينَ مِنْهُمْ﴾

(And others among them) by mentioning Persia.

Ibn 'Umar (may Allah be pleased with both of them) reported Allah's Apostle as saying:

We are an unlettered people who can neither write nor count. The month is thus, and thus. folding his thumb when he said it the third time.