“Taught man that which he knew not.
“Taught man that which he knew not.” The Occasion of the Revelation As it was mentioned in the description of the content of this Surah, the majority of commentators believe that this is the first Surah that came to the heart of the holy Prophet (S). Some have even said that all the commentators believe that the first five verses, of the Surah, were the first direct Revelation to the holy Prophet (S). Their contents confirm this idea, too.
Some narrations denote that the holy Prophet (S) had gone to Mount Hira when Gabriel came and told him: "Iqra'" (Read/ Proclaim). He said that he was not 'versed'. Gabriel embraced him and told him again to proclaim; and the Prophet (S) repeated the same answer. Gabriel embraced him for a second time, but was given the same answer. Then, for the fourth time he told him: "Read (Proclaim!) In the name of your Lord Who created", (and recited the first five verses).
Finishing the verse, Gabriel then took leave from the; Prophet (S). The Messenger of Allah, his energy spent due to receiving the first rays of Revelation, went to his wife, Khadijah, and told her: "Cover me; wrap me in a mantle”. The following is a tradition from Tabarsi in Majma'-al-Bayan, and he cites that the Messenger of Allah told Khadijah that whenever he was alone he heard a voice.
According to Tabarsi, Khadijah told Muhammad (S): "Allah will not bring anything on you but goodness because you are trustworthy and pay the deposits, you observe bonds of relationship, and you are truthful in speech.” Khadijah said this statement and then, she went to see Waraqah-ibn Nufil.
(He was Khadijah's cousin and was of the knowledgeable Arabs.) She described to him what had happened to Muhammad (S) and added that he had heard the voice say: "O Muhammad say: ‘Bismillah-ir-Rahman-ir-Rahim, al-Hamd-u-lillah-i-Rabb-al-'alamin (to the end of Surah Fatihah)'; and say: 'La Ilaha Illallah’”. Waraqah said: "Rejoice thou! Rejoice thou!
According to what is mentioned in Taurat and Ingeel it is clear that he is the Messenger of Allah and he is the very one that Jesus Christ told about in his glad tidings. He has a religion like that of Moses; he is an apostle.