One day while the Prophet (ﷺ) was sitting out for the people, there came a man and asked, "What is Faith?" Allâh's Messenger (ﷺ) replied, "Faith is to believe in Allâh, His angels, (the) meeting with Him, His Messenger's, and to believe in Resurrection [1]." Then he further asked, "What is Islâm?" Allâh's Messenger (ﷺ) replied, To worship Allâh Alone and none else, to perform Iqâmat-As-Salat [the offering of (prayers) perfectly], to pay the Zakât and to observe Şaum [fasts (according to Islâmic teachings)] during the month of Ramaḍân [2]." Then he further asked, "What is Ihsan (perfection)? Allâh's Messenger (ﷺ) replied, "To worship Allâh 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?" Allâh's Messenger (ﷺ) replied, The answerer has no better knowledge than the questioner. But I will inform you about its portents:

1. When a slave (lady) gives birth to her master.

2. When the shepherds of black camels start competing with others in the construction of higher buildings. And the Hour is one of the five things which nobody knows except Allâh."

The Prophet (ﷺ) then recited: " Verily, Allâh ! With Him (Alone) is the knowledge of the Hour, He sends down the rain, and knows that which is in the wombs. No person knows what he will earn tomorrow, and no person knows in what land he will die. Verily, Allah is All-Knower, All-Aware (of things) " (V.31:34).

Then that man left and (the Prophet (ﷺ) asked his companions) to call him back, but they could not see anything (him). Then the Prophet (ﷺ) said, "That was Jibrael (Gabriel) who came to teach the people their religion." [1:47-O.B.]