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?"
Sahih al-Bukhari Book 97, Hadith 147
← Previous Hadith Two person of Bani Thaqif and one from Quarish (or two persons from Quraish and one from Bani Thaqif) who had fat bellies but little wisdom, met near the Ka`ba. One of them said, "Did you see that Allah hears what we say? " The other said, "He hears us if we speak aloud, but He does not hear if we speak in stealthy quietness (softly)." The third fellow said, "If He hears when we speak aloud, then He surely hears us if we speak in stealthy quietness (softly)." So Allah revealed the Verse:-- 'And you have not been screening against yourselves, lest your ears, and your eyes and your skins should testify against you..." (41.22)

Sahih al-Bukhari Book 97, Hadith 146 Next Hadith → `Abdullah bin `Abbas said, "O the group of Muslims! How can you ask the people of the Scriptures about anything while your Book which Allah has revealed to your Prophet contains the most recent news from Allah and is pure and not distorted? Allah has told you that the people of the Scriptures have changed some of Allah's Books and distorted it and wrote something with their own hands and said, 'This is from Allah, so as to have a minor gain for it. Won't the knowledge that has come to you stop you from asking them? No, by Allah, we have never seen a man from them asking you about that (the Book Al-Qur'an ) which has been revealed to you.

Sahih al-Bukhari Book 97, Hadith 148