Sahih al-Bukhari 5036

Arabic

حَدَّثَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هُشَيْمٌ، أَخْبَرَنَا أَبُو بِشْرٍ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ جَمَعْتُ الْمُحْكَمَ فِي عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقُلْتُ لَهُ وَمَا الْمُحْكَمُ قَالَ الْمُفَصَّلُ‏.‏

English translation

Narrated Sa`id bin Jubair:Ibn `Abbas said, "I have learnt all the Muhkam Suras during the life time of Allah's Messenger (ﷺ)." I said to him, 'What is meant by the Muhkam?" He replied, "The Mufassal

Reference: Sahih al-Bukhari 5036, Book of Virtues of the Qur'an. English translation by Dr. Muhammad Muhsin Khan.