Sahih al-Bukhari 1110
صحيح البخاري#1110Sahihحَدَّثَنَا إِسْحَاقُ، حَدَّثَنَا عَبْدُ الصَّمَدِ، حَدَّثَنَا حَرْبٌ، حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنِي حَفْصُ بْنُ عُبَيْدِ اللَّهِ بْنِ أَنَسٍ، أَنَّ أَنَسًا ـ رضى الله عنه ـ حَدَّثَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَجْمَعُ بَيْنَ هَاتَيْنِ الصَّلاَتَيْنِ فِي السَّفَرِ. يَعْنِي الْمَغْرِبَ وَالْعِشَاءَ.
Narrated Anas bin Malik:Whenever the Prophet (ﷺ) started a journey before noon, he used to delay the Zuhr prayer till the time of `Asr and then offer them together; and if the sun declined (at noon) he used to offer the Zuhr prayer and then ride (for the journey)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 18:30