Sahih Muslim Book 20, Hadith Number 4552.

Chapter : Obedience to be shown to the (Caliphs) even if they withhold the people’s due rights.

It has been narrated through a different chain of transmitters, on the authority of Simak who said: Ash’ath b. Qais pulled him (Salama b. Yazid) when the Messenger of Allah (may peace be upon him) said: Listen to them and obey them, for on them shall be the burden of what they do and on you shall be the burden of what you do.