Translation:

2. It is He Who has sent amongst the Unlettered an apostle from among themselves to rehearse to them His Signs to sanctify them and to instruct them in Scripture and Wisdom although they had been before in manifest error

Notes (Tafseer)

5451. The Unlettered: as applied to a people, it refers to the Arabs, in comparison with the People of the Book, who had a longer tradition of learning, but whose failure is referred to in verse 5 below. As applied to individuals, it means that Allah's Revelation is for the benefit of all men, whether they have worldly learning or not.

5452. His Signs: Allah's wonderful Signs in His Creation and in His ordering of the world. It may include the Verses of the Qur-an, but they are more specifically referred to as "Book" in the next line but one.

5453. Cf. ii. 129, and n. 129. Read again the attributes in the last verse. Allah is full Sovereign, and therefore cares for all His subjects, including the meanest and most ignorant, and sends His prophets or messengers to them. He is the Holy One, and therefore purifies and sanctifies those who were steeped in superstition and wickedness. He is Exalted in Power, and therefore He can confer all these blessings on the most unlikely people (verse 3), and no one can stay His hand. He is wise, and therefore He instructs in wisdom, both through written Scriptures, and in other ways, e.g., by means of a knowledge of life and its laws, and an understanding of His wonderful universe.

5454. Previous ignorance or error is no bar to a person or nation receiving the blessings of Allah's revelation, provided such person or nation has the will to come to Allah and the capacity to bear His Message. For an instance of incapacity through arrogance, see verse 6 below.