Musnad Ahmad

And he said that once the Prophet (peace be upon him) was sitting in a gathering when Hazrat Jibreel (peace be upon him) came and sat down in front of the Prophet (peace be upon him), placing his hands on his knees, and said: "O Messenger of Allah! Tell me, what is the definition of Islam?" The Prophet (peace be upon him) said: "The definition of Islam is that you submit yourself to Allah, testify that there is no deity except Allah, He is alone, He has no partner, and that Muhammad (peace be upon him) is His servant and Messenger." He asked: "After doing this, will I be counted as a Muslim?" He replied: "Yes! When you do this, you will be counted as a Muslim." Then he said: "O Messenger of Allah! Tell me, what is Iman (faith)?" He replied: "Iman is that you have complete faith in Allah, the Day of Judgment, the angels, the Book, the Prophets, death and life after death, Paradise and Hell, accountability, the scale of deeds, and destiny—whether it is good or bad." He asked: "When I do this, will I be counted as a believer?" The Prophet (peace be upon him) said: "Yes! When you do this, you will be counted as a believer." Then he said: "O Messenger of Allah! Tell me, what is Ihsan (excellence)?" He replied: "Ihsan is that you perform any act for the pleasure of Allah as if you are seeing Allah; if you cannot imagine that, then imagine that Allah is seeing you." He said: "O Messenger of Allah! Tell me, when will the Hour (Day of Judgment) come?" The Prophet (peace be upon him) said: "Subhan Allah! This is one of the five things of the unseen which no one knows except Allah. The command of the Lord is: « ﴿إِنَّ اللّٰهَ عِنْدَهُ عِلْمُ السَّاعَةِ وَيُنَزِّلُ الْغَيْثَ وَيَعْلَمُ مَا فِي الْأَرْحَامِ وَمَا تَدْرِي نَفْسٌ مَاذَا تَكْسِبُ غَدًا وَمَا تَدْرِي نَفْسٌ بِأَيِّ أَرْضٍ تَمُوتُ إِنَّ اللّٰهَ عَلِيمٌ خَبِيرٌ﴾ [لقمان : 34] » 'With Allah alone is the knowledge of the Hour, He sends down the rain, He knows what is in the wombs, no soul knows what it will earn tomorrow, and no person knows in which land he will die. Surely Allah is All-Knowing, All-Aware.'" However, if you wish, I can tell you some of its signs which will occur before it?" He said: "O Messenger of Allah! Please tell me." He replied: "When you see that a slave girl gives birth to her mistress, and the shepherds of sheep are boasting with each other over tall buildings, and the naked, hungry, and needy people have become leaders, then these are among the signs and indications of the Hour." He asked: "O Messenger of Allah! Who are these shepherds, naked, hungry, and needy people?" He replied: "The people of Arabia."