Muhammad b. Isma'il al-Bukhari said sixty-three is the commonest statement. `A'isha said:The first revelation God's messenger received was the true vision in sleep, and every vision he saw came like the bright gleam of dawn. He then became fond of solitude and would go alone to the cave on Hira where he would engage in tahannuth, which means worship for a number of nights, before feeling a yearning for his family. He would take provisions for that purpose, then he would return to Khadija and get provisions for a like period, till the truth came to him when he was in the cave on Hira. The angel came to him and said, `Recite,' to which he replied, "I am not a reciter." He said, "He then took me and squeezed me till I was distressed, after which he let me go and said, `Recite.' When I replied, `I am not a reciter,' he took me and squeezed me a second time till I was distressed, then letting me go he said, `Recite;' When I replied, "I am not a reciter,' he took me and squeezed me a third time till I was distressed. He then let me go and said, `Recite! In the name of your Lord who created, created man from a clot of blood. Recite! And your most bountiful Lord is He who taught the use of the pen, taught man what he did not know.' " God's messenger came back with the verses, his heart trembling, and went in to Khadija and, said "Wrap me up, wrap me up." So, they wrapped him up till the terror had left him. He then spoke to Khadija and informed her of what had happened, saying, "I fear for myself." She replied, "By no means! I swear by God that God will never shame you. You join ties of relationship, you speak the truth, you bear people's burdens, you give to the destitute, you entertain guests, and you help against the vicissitudes which affect people's rights." Khadija then took him to Waraqa b. Naufal, her paternal cousin, and said to him, "Listen, cousin, to what your nephew has to say." Waraqa said to him, "Son of my brother, what do you see?'' God's messenger then informed him about what he had seen and Waraqa said, "It is the namus which God sent down to Moses. Would that I were a young man during your prophetic career! Would that I might be alive when your people expel you!" God's messenger asked, "Will they expel me?'' and he replied, "Yes; no man has ever brought anything like what you have brought without meeting hostility. If I see your day, I shall give you strong help."Waraqa died soon afterwards, and there was an intermission in the inspiration. Bukhari and Muslim.