Why have not Al-Bukhari himself wrote what he has collected? Is it really possible for Muslims to depend on writers about whom they know nothing; and, consequently, build a whole religion on nothing but a guess?

Yahya related to me from Malik that he heard that the Messenger of Allah, may Allah bless him and grant him peace, said, "I have left two things with you. As long as you hold fast to them, you will not go astray. They are the Book of Allah and the Sunnah of His Prophet.