Sahih Muslim 2609
صحيح مسلم#2609Sahihوَحَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ عَبْدِ الْكَرِيمِ، عَنْ طَاوُسٍ، عَنِ ابْنِ، عَبَّاسٍ - رضى الله عنهما - قَالَ لاَ تَعِبْ عَلَى مَنْ صَامَ وَلاَ عَلَى مَنْ أَفْطَرَ قَدْ صَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي السَّفَرِ وَأَفْطَرَ .
Ibn Abbas (Allah be pleased with him) reported:Do not condemn one who observes fast, or one who does not observe (in a journey). for the Messenger of Allah (ﷺ) observed fast in a journey or he did not observe it (too)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 13:115