Maliks Muwatta Book 17, Hadith Number 43.
Section : Jizya on People of the Book and Magians.
Yahya related to me from Malik from Jafar ibn Muhammad ibn Ali from his father that Umar ibn al-Khattab mentioned the magians and said, “I do not know what to do about them.” Abd ar-Rahman ibn Awf said, “I bear witness that I heard the Messenger of Allah, may Allah bless him and grant him peace, say, ‘Follow the same sunna with them that you follow with the people of the Book.'”