Yahya related to me from Malik that Yahya ibn Said said, ''Ubada
ibn al-Walid ibn Ubada ibn as-Samit informed me from his father that
his grandfather (Ubada) said, 'We made a contract with the Messenger
of Allah, may Allah bless him and grant him peace, to hear and obey in
ease and hardship, enthusiasm and reluctance, and not to dispute with
people in authority and to speak or establish the truth wherever we
were without worrying about criticism.'"
Muwatta Malik Book 21, Hadith 5