Narrated Usaid bin Hudair (Radi-Allahu 'anhu):
A man came to the Prophet (Sallallahu 'Alaihi Wa Sallam) and said, "O Allah's Apostle! You appointed such-and-such person and you did not appoint me?" The Prophet (Sallallahu 'Alaihi Wa Sallam) 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."
Bukhari Vol. 9 : No. 179
Narrated Ibn Abbas (Radi-Allahu 'anhu):
The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "Whoever disapproves of something done by his ruler then he should be patient, for whoever disobeys the ruler even a little (little = a span) will die as those who died in the Pre-lslamic Period of Ignorance. (i.e. as rebellious Sinners).
Bukhari Vol. 9 : No. 176
Narrated Asma' (Radi-Allahu 'anha):
The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "I will be at my Lake-Fount (Kauthar) waiting for whoever will come to me. Then some people will be taken away from me whereupon I will say, 'My followers!' It will be said, 'You do not know they turned Apostates as renegades (deserted their religion).'" (Ibn Abi Mulaika said, "Allah, we seek refuge with You from turning on our heels from the (Islamic) religion and from being put to trial").
Bukhari Vol. 9 : No. 172