Sahih Bukhari | Volume 8 | Hadith Number 233
Narrated by Jabir bin 'Abdullah
That he heard Allah's Apostle saying. "Then there was a pause in the revelation of the Divine Inspiration to me. Then while I was walking all of a sudden I heard a voice from the sky, and I raised my sight towards the sky and saw the same angel who had visited me in the cave of Hira,' sitting on a chair between the sky and the earth."