In Sunni Islam, the Hadith of Gabriel is the single most important hadith, of the last prophet of Islam. Its narrative contains the best summary of the core of Islam: Islām, which is described with the "Five Pillars of Islam," Īmān, which is described with the "Six Articles of Faith," Iḥsān, or "doing what is beautiful," and al-Sā’ah, or The Hour, which is not described, but signs are given. This hadith is found in both the Ṣaḥīḥ al-Bukhārī and the Ṣaḥīḥ Muslim collections and is known to express the religion of Islam in a nutshell. Muslim scholars named this hadith "the Hadith of Gabriel" because the archangel Gabriel appears to the Prophet and those around him in a human form.
Al-Bukhārī's version
Narrated by Abu Huraira, one of the Prophet's closest Sahabah: One day while the Prophet was sitting in the company of some people, Gabriel came and asked, "What is faith?" Allah's Messenger replied, 'Faith is to believe in Allah, His angels, meeting with Him, His Apostles, and to believe in Resurrection." Then he further asked, "What is Islam?" Allah's Messenger replied, "To worship Allah Alone and none else, to offer prayers perfectly, to pay the compulsory charity and to observe fasts during the month of Ramadan." Then he further asked, "What is Ihsan ?" Allah's Messenger replied, "To worship Allah as if you see Him, and if you cannot achieve this state of devotion then you must consider that He is looking at you." Then he further asked, "When will the Hour be established?" Allah's Messenger replied, "The answerer has no better knowledge than the questioner. But I will inform you about its portents.
When a slave gives birth to her master.
When the shepherds of black camels start boasting and competing with others in the construction of higher buildings. And the Hour is one of five things which nobody knows except Allah.
The Prophet then recited: "Verily, with Allah is the knowledge of the Hour--." Then that man left and the Prophet asked his companions to call him back, but they could not see him. Then the Prophet said, "That was Gabriel who came to teach the people their religion." Abu 'Abdullah said: He considered all that as a part of faith.
Muslim's version
Also from 'Umar', there is that he said, "While we were sitting with the Messenger of Allah, may Allah bless with him and grant him peace, one day a man came up to us whose clothes were extremely white, whose hair was extremely black, upon whom traces of traveling could not be seen, and whom none of us knew, who sat down knee-to-knee with the Prophet, may Allah bless with him and grant him peace. said, 'Muhammad, tell me about Islam.' said, 'Islam is that you witness that there is no god but Allah and that Muhammad is the Messenger of Allah, and you establish the prayer, and you give the Zakat, and you fast Ramadan, and you perform the hajj to the House if you are able.' He said, 'You have told the truth,' and we were amazed at him asking him and telling him that he told the truth. He said, 'Tell me about Iman.' He said, 'That you affirm Allah, His angels, His books, His messengers, and the Last Day, and that you affirm the Decree , the good of it and the bad of it.' He said, 'You have told the truth.' He said, 'Tell me about Ihsan.' He said, 'That you worship Allah as if you see Him, for if you don't see Him then truly He sees you.' He said, 'Tell me about the Hour.' He said, 'The one asked about it knows no more than the one asking.' He said, 'Then tell me about its signs.' He said, 'That the female slave should give birth to her mistress, and you see poor, naked, barefoot shepherds of sheep and goats competing in making tall buildings.' He went away, and I remained some time. Then he asked, 'Umar, do you know who the questioner was?' I said, 'Allah and His Messenger know best.' He said, 'He was Jibril who came to you to teach you your deen'." Muslim narrated it.
