Yahya related to me from Malik that he heard that the Messengerof Allah, may Allah bless him and grant him peace, said, "I have lefttwo matters with you. As long as you hold to them, you will not go thewrong way. They are the Book of Allah and the Sunna of His Prophet."
USC-MSA web (English) reference: Book 46, Hadith 3
Arabic reference: Book 46, Hadith 1628