Ṣaḥīḥ Muslim

‘Umar ibn al-Khattāb (may Allah be pleased with him) reported: One day, we were sitting with the Messenger of Allah (may Allah's peace and blessings be upon him) when there appeared before us a man dressed in extremely white clothes and had very black hair. No traces of travel were visible on him, and none of us knew him. He came in and sat down opposite the Prophet (may Allah's peace and blessings be upon him), rested his knees against his, and placed the palms of his hands on his (the Prophet's) thighs.

He said: "O Muhammad, tell me about Islam." The Messenger of Allah (may Allah's peace and blessings be upon him) said: "Islam is to testify that there is no god but Allah and that Muhammad is the Messenger of Allah, to establish prayer, to pay Zakah, to fast Ramadan, and to perform Hajj to the House if you are able to find a way thereto." He said: "You have spoken the truth." We wondered how he asked him and affirmed his truthfulness.

Then, he said: "Tell me about Imān (faith)." He said: "It is to believe in Allah, His angels, His books, His messengers, and the Last Day, and believe in the divine decree, the pleasant and unpleasant aspects thereof." Then, he said: "You have spoken the truth." Then, he said: "Tell me about ihsān." He said: "It is to worship Allah as if you see Him, for if you do not see Him, He sees you." He said: "Tell me about the Hour." He said: "The one questioned about it knows no more than the questioner." He said: "Then, tell me about its signs." He said: "The slave girl will give birth to her mistress, and you will see the barefoot, naked, and destitute herdsmen competing in constructing lofty buildings." Then, he departed.

I stayed for a while, and then he said to me: "O 'Umar, do you know who the questioner was?" I said: "Allah and His Messenger know best." He said: "He was Jibrīl (Gabriel). He came to teach you your religion."