The Trustworthy Angel brought Allah's Revelation to the Trustworthy Messenger

Allah the Exalted states that the Message His servant and Messenger Muhammad ﷺ brought to people was taught to him by,

شَدِيدُ الْقُوَى

مَا زَاغَ الْبَصَرُ‌ وَمَا طَغَىٰ (The eye neither went wrong, nor did exceed the limit...53:17) The verb zagha is derived from the infinitive zaigh which denotes to become crooked or go astray. Tagha is derived from tughyan which means to transgress or exceed the limit. The two expressions purport to say that in whatever the Holy Prophet ﷺ saw, his eyes did not err or slip up. This verse allays the suspicion that sometimes human sight errs or slips up, especially when some wonderful or unusually marvelous thing is seen. In response to this suspicion the Qur'an uses two expressions because there are two ways in which human sight can go awry: [ 1] not looking at the object directly that one was supposed to see, and turning the eye to some other side. Ma zagha (neither went wrong) negates this situation. The Holy Prophet's ﷺ sight did not swerve or turn right or left, and thus did not miss the intended object. He saw exactly what was meant for him to see. [ 2] looking at the desired object, but at the same time looking at other objects also. In this situation too there is sometimes the fear of losing sight of the main object and causing confusion. Ma tagha (nor did it exceed the limit) in the verse is used to remove this doubt that the Holy Prophet ﷺ might have looked at other things in addition to what he was ordained to see.

Scholars who interpret the preceding verses as referring to the vision of Jibra'il (علیہ السلام) explain this verse to mean that the eye of the Holy Prophet ﷺ did not err in seeing him. This had to be clarified because Jibra'il (علیہ السلام) is the transmitting medium. If the Holy Prophet ﷺ did not see him clearly and recognize him, the revelation would not be beyond doubt.