The myth rests on the assumption that the Prophet was tired...
The myth rests on the assumption that the Prophet was tired of the responsibility which Allah had laid on his shoulders and was very much perturbed on account of the deviation and remoteness of his people. He was therefore, anxious to find out ways and means to improve their condition. However, wisdom ordains that the prophets should be very patient and forbearing, their fortitude should be proverbial amongst all and they should never think of abandoning their mission.
If this myth be a true and confirmed incident it would mean that the hero of our narrative had lost his fortitude and patience and his spirit had become depressed and tired. This thing is not, however, in consonance with the verdict of wisdom and does not also accord with the Prophet's past and future life, as we know it.
The inventor of this story has ignored the fact that the Qur'an bears testimony to the falsehood of this story, because Allah has given him good tidings that falsehood would not enter his path. This is a Mighty Scripture. Falsehood cannot reach it from before or behind. (Surah al-Fussilat, 41:42) Allah has also given an absolute promise that He would protect the Qur'an from every harm throughout human history. Surely we have revealed the Qur'an and We will most surely be its Guardian.
(Surah Hijr, 15:9) Hence, could it be possible that an outcast (Satan) should overpower the chosen one of Allah, insert falsehood in his Qur'an and make the Qur'an, whose very foundation is laid on campaign against idol-worship, a promoter of the system of idolatry.
It is strange that the inventor of this myth has sung a tuneless song and has calumniated the Oneness of Allah at that spot where a few moments earlier the Holy Qur'an has itself contradicted this calumniation, because in the second and third verses of the same Surah the Almighty Allah says: He (the Prophet) does not speak out of his own fancy. This is an inspired revelation. He is taught by One who is Powerful and Mighty.
(Surah al-Najm, 53:3 - 5) In spite of this positive tiding how could He leave His Prophet unprotected and allow that Satan should take possession of his mind and thoughts? We are sorry to discuss this myth to a greater extent than it deserves. But the fact is that our remarks are based on rational arguments and are useful for those who believe in the prophethood of the Prophet.