Gabriel came and asked, “What is faith?” Allah’s Messenger replied, ‘Faith is to believe in Allah, His angels, (the) 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 (Zakat) and to observe fasts during the month of Ramadan.”
Then he further asked, “What is Ihsan (perfection)?” 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.”