كتاب التفسير
65  
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
(4)
The Statement of Allah "Who have made the Qur'an into parts (i.e., believed in one part and disbelieved in the other) ." (V.15:91)
(4)
Sahih al-Bukhari 4706

Narrated Ibn `Abbas concerning:

"As We have sent down (the Scripture) on those who are divided (Jews and Christians)." (15.90) They believed in part of it and disbelieved in the other, (and they) are the Jews and the Christians.

حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنِ الأَعْمَشِ، عَنْ أَبِي ظَبْيَانَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ ‏{‏كَمَا أَنْزَلْنَا عَلَى الْمُقْتَسِمِينَ‏}‏ قَالَ آمَنُوا بِبَعْضٍ وَكَفَرُوا بِبَعْضٍ، الْيَهُودُ وَالنَّصَارَى‏.‏
Reference : Sahih al-Bukhari 4706
In-book reference : Book 65, Hadith 228
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 229
  (deprecated numbering scheme)