He had taken to withdrawing to the cave of Hira on the mountain outside Makkah, staying for nights at a time in solitude before returning to his family for provisions. In his fortieth year, during one of these retreats, the angel came to him with the command to read.

He answered that he could not read. The account describes the angel pressing him until he could bear no more, releasing him, and repeating the command twice again, before reciting to him the opening verses of Surah al-Alaq.

He returned home shaken and asked to be covered. Khadijah reassured him, reminding him of his conduct toward others, and took him to her cousin Waraqah ibn Nawfal, an elderly man who knew the earlier scriptures. Waraqah identified what had come to him as the same messenger that had come to Musa, and told him his people would drive him out.