It was narrated that Humaid bin Hilal said: "Abu Rifa'ah said: 'I came to the Messenger of Allah SAW while he was delivering a Khutbah, and said: "O Messenger of Allah, a stranger has come to ask about his religion, for he does not know what his religion is". The Messenger of Allah SAW stopped delivering his Khutbah and turned to me. A chair was brought, and I think its legs were of iron. The Messenger of Allah SAW sat down on it and started to teach me what Allah has taught him, then he went and completed his Khutbah'."