Sahih Bukhari
Afflictions and the End of the World
Volume: 009 / Book Number: 088 / Hadith Number: 179
Narrated Usaid bin Hudair:
A man came to the Prophet and said, "O Allah's Apostle! You appointed such-and-such person and you did not appoint me?" The Prophet said, "After me you will see rulers not giving you your right (but you should give them their right) and be patient till you meet me."