Sahih Muslim 8e

Abu Bakr ibn Abi Shaybah and Zuhayr ibn Harb narrated to us, both from Ibn Ulayyah. Zuhayr said: Isma'il ibn Ibrahim narrated to us, from Abu Hayyan, from Abu Zur'ah ibn Amr ibn Jarir, from Abu Hurayrah, who said: One day the Messenger of Allah (peace and blessings be upon him) was out in the open before the people when a man came to him and said, ‘Messenger of Allah, what is faith?’ He replied, ‘That you believe in Allah, His angels, His Book, meeting Him, His messengers, and that you believe in the Resurrection after death.’ He said, ‘Messenger of Allah, what is Islam?’ He replied, ‘Islam is that you worship Allah and associate nothing with Him, establish the prescribed prayer, pay the obligatory zakat, and fast Ramadan.’ He said, ‘Messenger of Allah, what is ihsan?’ He replied, ‘That you worship Allah as though you see Him; for if you do not see Him, He sees you.’ He said, ‘Messenger of Allah, when is the Hour?’ He replied, ‘The one who is asked about it knows no more than the one who asks. But I shall tell you about its signs: when a slave woman gives birth to her master, that is one of its signs; when the barefoot and unclothed become the leaders of the people, that is one of its signs; and when the shepherds of livestock compete in building, that is one of its signs. It is among five things that none knows except Allah.’ Then he recited: ‘Indeed, Allah has knowledge of the Hour, sends down rain, and knows what is in the wombs. No soul knows what it will earn tomorrow, and no soul knows in what land it will die. Indeed, Allah is Knowing, Aware.’ Then the man turned away. The Messenger of Allah (peace and blessings be upon him) said, ‘Bring that man back to me.’ They went to bring him back, but they saw nothing. The Messenger of Allah (peace and blessings be upon him) said, ‘That was Gabriel; he came to teach the people their religion.’