Sunan Ibn Majah, Chapter: The Chapters on Jihad

"We gave our pledge to the Messenger of Allah (saw), pledging to listen and obey in times of hardship and times of ease, willingly or reluctantly, and when others are shown preference over us, and that we would not dispute the order of those in charge, that we would speak the truth wherever we are, and that we would not fear the blame of anyone when acting or speaking for the sake of Allah."