Narrated Jabir bin `Abdullah:
that he heard the Prophet (ﷺ) saying, "The Divine Inspiration was delayed for a short period but suddenly, as I was walking. I heard a voice in the sky, and when I looked up towards the sky, to my surprise, I saw the angel who had come to me in the Hira Cave, and he was sitting on a chair in between the sky and the earth. I was so frightened by him that I fell on the ground and came to my family and said (to them), 'Cover me! (with a blanket), cover me!' Then Allah sent the Revelation: "O, You wrapped up (In a blanket)! (Arise and warn! And your Lord magnify And keep pure your garments, And desert the idols." (74.1-5)
Yahya reported: I asked Abu Salama what was revealed first from the Qur'an. He said:" 0, the shrouded one." I said: Or" Recite." Jabir said: I am narrating to you what was narrated to us by the Messenger of Allah (ﷺ). He said: I stayed in Hira' for one month and when my stay was completed, I come down and went into the heart of the valley. Somebody called me aloud. I looked in front of me, behind me, on the right of my side and on my left, but I did not see any body. I was again called and I looked about but saw nothing. I was called again and raised my head, and there on the Throne in the open atmosphere he, i. e. Gabriel (peace be upon him) was sitting. I began to tremble on account of fear. I came to Khadija and said: Wrap me up. They wrapped me up and threw water on me and Allah, the Exalted and Glorious, sent down this: you who are shrouded! arise and deliver warning, your Lord magnify, your clothes cleanse."