Narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that one day the Noble Prophet (peace and blessings be upon him) was sitting among the people when a man came and said, "O Messenger of Allah (peace and blessings be upon him), what is faith?" The Noble Prophet (peace and blessings be upon him) replied, "Faith is that you believe in Allah, His angels, His books, meeting Him, His messengers, and resurrection after death." He asked, "O Messenger of Allah (peace and blessings be upon him), what is Islam?" He replied, "Islam is that you worship Allah and do not associate anything with Him, establish the obligatory prayers, pay the obligatory zakat, and fast in Ramadan." He asked, "O Messenger of Allah (peace and blessings be upon him), what is Ihsan?" He replied, "Ihsan is that you worship Allah as if you are seeing Him, and if you cannot achieve this state, then (know that) He sees you." He then asked, "O Messenger of Allah, when will the Hour (Day of Judgment) come?" The Noble Prophet (peace and blessings be upon him) replied, "The one being questioned knows no more than the questioner, but I will tell you its signs: when a slave woman gives birth to her master, that is a sign of the Hour; when the barefoot, naked, destitute shepherds compete in constructing tall buildings, that is a sign of the Hour; and there are five things whose knowledge is only with Allah." Then the Noble Prophet (peace and blessings be upon him) recited this verse: "Indeed, Allah alone has knowledge of the Hour, He sends down the rain, and knows what is in the wombs. And no soul knows what it will earn tomorrow, and no soul knows in which land it will die."