Translation of the verse 51 from Surah Ash-Shura : Number of verses 53 - - page 488 - Part 25.
It is not given to any human being that Allah should speak to him unless (it be) by Inspiration, or from behind a veil, or (that) He sends a Messenger to reveal what He wills by His Leave. Verily, He is Most High, Most Wise.
And it is not for any human being that Allah should speak to him except by revelation or from behind a partition or that He sends a messenger to reveal, by His permission, what He wills. Indeed, He is Most High and Wise.
(42:51) It *78 is not given to any human being that Allah should speak to him except through revelation, *79 or from behind a veil, *80 or that a messenger (an angel) be sent to him who reveals to him by Allah's leave whatever He wishes. *81 He is All-High, Most Wise. *82
*78) In conclusion, the same theme with which the discourse began has been reiterated. To understand it fully, please see the first verse of this Surah and the E.N. on it.
*79) Here, wahi means to inspire somebody with something, or to show something to somebody in a vision as were the Prophets Abraham and Joseph shown, (Yusuf: 4, 100; As-Saaffat: 102).
*80) That is, "One may hear a voice without seeing the speaker, just as it happened in the case of the Prophet Moses when he suddenly began to hear a voice from a tree on Mount Tur, while the Speaker was hidden from him." (Ta Ha: 11-48, An-Naml: 8-12, Al-Qasas: 30 35).
*81) This is the form of wahi by which all Divine Scriptures have actually reached the Prophets of Allah. Some people have misinterpreted this sentence and given it this meaning Allah sends a messenger who by His Command conveys His message to the common people." But the words of the Qur'an fa-yuhiya biidhni-hi ma yasha'u (then He reveals by His Command whatever He wills) show that this interpretation is absolutely wrong. The Prophets' preaching before the common people has neither been called wahi anywhere in the Qur'an, nor is there any room in Arabic for describing a man's speaking to another man openly by the word wahi'. Lexically, wahi means secret and swift instruction. Only an ignorant person will apply this word to the common preaching by the Prophets.