"Umar bin Al-Khattab told me: 'While we were with the Messenger of Allah said to me: "O 'Umar, do you know who the questioner was?" I said: "Allah and His Messenger know best." He said: "That was Jibril, peace be upon him, who came to you to teach you your religion."
Sunan an-Nasa'i Book 47, Hadith 6
← Previous Hadith The Prophet ; and when he would hate to go back to disbelief as much as he would hate to be thrown into the fire."

Sunan an-Nasa'i Book 47, Hadith 5 Next Hadith → "The Messenger of Allah . Verily, Allah, with Him (alone) is the knowledge of the Hour up to His saying: 'Verily, Allah is All-Knower, All-Aware (of things).' Then he said: 'No, by the One who sent Muhammad with the truth, with guidance and glad tidings, I did not know him more than any man among you. That was Jibril, peace be upon you, who came down in the form of Dihyah Al-Kalbi.'"

Sunan an-Nasa'i Book 47, Hadith 7