Sahih al-Bukhari — Oneness, Uniqueness of Allah (Tawheed) — Hadith No: 7522
Translation
Narrated `Ikrima:Ibn `Abbas said, "How can you ask the people of the Scriptures about their Books while you have Allah's Book (the Qur'an) which is the most recent of the Books revealed by Allah, and you read it in its pure undistorted form?