Sahih al-Bukhari 1102
صحيح البخاري#1102Sahihحَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عِيسَى بْنِ حَفْصِ بْنِ عَاصِمٍ، قَالَ حَدَّثَنِي أَبِي أَنَّهُ، سَمِعَ ابْنَ عُمَرَ، يَقُولُ صَحِبْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم فَكَانَ لاَ يَزِيدُ فِي السَّفَرِ عَلَى رَكْعَتَيْنِ، وَأَبَا بَكْرٍ وَعُمَرَ وَعُثْمَانَ كَذَلِكَ ـ رضى الله عنهم.
Narrated Ibn `Umar:I accompanied Allah's Messenger (ﷺ) and he never offered more than two rak`at during the journey. Abu Bakr, `Umar and `Uthman used to do the same
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: 18:22