It was narrated from ‘Aishah that Al-Harith bin Hisham asked the Messenger of Allah صلی اللہ علیہ وآلہ وسلم : “How does the Revelation come to you?” He said: “Like the ringing of a bell, and this is the hardest on me. When it departs I remember what he said. And sometimes the Angel appears to me in the form of a man and speaks to me, and I remember what he said.” ‘Aishah said: “I saw him when the Revelation came to him on a very cold day, and his forehead was dripping with sweat.”(Sahih).