Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) says: The Messenger of Allah (peace and blessings be upon him) was sitting in a gathering when Jibreel (peace be upon him) came and sat in front of him in such a way that he placed his palms on the knees of the Messenger of Allah (peace and blessings be upon him) and said: O Messenger of Allah! Tell me about Islam... (The narrator mentioned a long hadith, in which these words were also included:) He said: O Messenger of Allah! Tell me, when will the Hour (Day of Judgment) come? The Messenger of Allah (peace and blessings be upon him) said: "SubhanAllah! The knowledge of five matters is from the unseen, only Allah knows them, (those five things are mentioned in this verse:) «إِنَّ اللَّـهَ عِنْدَهُ عِلْمُ السَّاعَةِ وَيُنَزِّلُ الْغَيْثَ وَيَعْلَمُ مَا فِي الْأَرْحَامِ وَمَا تَدْرِي نَفْسٌ مَاذَا تَكْسِبُ غَدًا وَمَا تَدْرِي نَفْسٌ بِأَيِّ أَرْضٍ تَمُوتُ إِنَّ اللَّـهَ عَلِيمٌ خَبِيرٌ» 'Indeed, with Allah alone is knowledge of the Hour, He sends down the rain, and knows what is in the wombs. No soul knows what it will earn tomorrow, and no soul knows in which land it will die. (Remember that) Allah is All-Knowing, All-Aware.' (31-Luqman:45) However, if you wish, I can inform you about the sign that will occur before the Hour." He said: Yes, O Messenger of Allah! Please tell me. The Messenger of Allah (peace and blessings be upon him) said: "You will see that the slave girl will give birth to her master, and the shepherds of sheep (will compete) in constructing lofty buildings. The barefoot, hungry, and poor people will become the leaders of the people. These are the signs and conditions of the Hour." He said: O Messenger of Allah, who are meant by the shepherds of sheep, the barefoot, the hungry, and the poor? The Messenger of Allah (peace and blessings be upon him) said: "The Arabs."