Eventually...
Eventually, he was able to repeat the five verses whereupon the angel released him and disappeared. When Archangel Gabriel disappeared, Muhammad, who was now “ordained” the Messenger of Allah, descended from the cliffs of Hira, and repaired to his home in a state of great trepidation. He was shivering with cold, and when he entered his house, he asked his wife, Khadija, to cover him with a blanket which she did.
When he had sufficiently recovered from the shock, he recounted to her the story of his strange encounter with Archangel Gabriel in the cave of Hira. The traditional Sunni account of this incident is given in an article written by Shaykh Ahmad Zaki Hammad, Ph.D., captioned Be Hopeful, (1) as follows: “The Prophet (pbuh) in the early stages in Mecca, feared that the revelation experience was an evil touch preying upon him, playing with him mentally, upsetting his tranquility and peace of mind.
He was afraid that one of the jinn had touched him. He expressed this to Khadija. His fear increased to the point that – and please don’t be surprised by an authentic report in Bukhari – the Prophet (pbuh) preferred to take his own life rather than to be touched by evil, to be tampered with, corrupted, or polluted.” But according to the accounts of the Shia Muslims, Muhammad Mustafa, far from being surprised or frightened by the appearance of Gabriel, welcomed him as if he had been expecting him.
Gabriel brought the tidings that Allah had chosen him to be His Last Messenger to Mankind, and congratulated him on being selected to become the recipient of the greatest of all honors for a mortal in this world. Muhammad had no hesitation in accepting the mission of prophethood nor he had any difficulty in repeating the verses of the First Revelation. He read them or repeated them effortlessly, spontaneously.
Gabriel, in fact, was no stranger to him, and he also knew that his own raison was to carry out the mission imposed upon him by God as His Messenger. He was “mission-oriented” even before Gabriel’s visit. Gabriel only gave him the signal to begin. The Shia Muslims also say that one thing that Gabriel didn’t have to do, was to apply physical pressure on Muhammad to read. If he did, it would truly be a bizarre mode of imparting to Muhammad the ability to read – by squeezing him or choking him.