Chapter 39: The Book of al-Bay'ah
Jarir said: "I came to the Prophet when he was accepting (the people' s) pledge, and said: 'O Messenger of Allah, extend you hand so that I may give you my pledge, and state your terms, for you know best.' He said: 'I accept you pledge that you will worship Allah, establish Salah, pay the Zakah, be sincere toward the Muslims, and forsake the idolaters."
Sunan an-Nasa'i 4177