Sahih al-Bukhari 1107
صحيح البخاري#1107Sahihوَقَالَ إِبْرَاهِيمُ بْنُ طَهْمَانَ عَنِ الْحُسَيْنِ الْمُعَلِّمِ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَجْمَعُ بَيْنَ صَلاَةِ الظُّهْرِ وَالْعَصْرِ إِذَا كَانَ عَلَى ظَهْرِ سَيْرٍ، وَيَجْمَعُ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ.
Narrated Ibn `Abbas: Allah's Messenger (ﷺ) used to offer the Zuhr and `Asr prayers together on journeys, and also used to offer the Maghrib and `Isha' prayers together. Narrated Anas bin Malik: The Prophet (ﷺ) used to offer the Maghrib and the `Isha' prayers together on journeys
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 18:27