Sahih al-Bukhari, Hadith 7522 ⓘ
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?"
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا حَاتِمُ بْنُ وَرْدَانَ، حَدَّثَنَا أَيُّوبُ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ كَيْفَ تَسْأَلُونَ أَهْلَ الْكِتَابِ عَنْ كُتُبِهِمْ وَعِنْدَكُمْ كِتَابُ اللَّهِ أَقْرَبُ الْكُتُبِ عَهْدًا بِاللَّهِ، تَقْرَءُونَهُ مَحْضًا لَمْ يُشَبْ
also referenced under: Book 97, Hadith 147 (In-Book) & Volume 9, Book 93, Hadith 613 (USC-MSA)