Sahih Muslim 2626
صحيح مسلم#2626SahihA'isha (Allah be pleased with her) reported that Hamza b. Amr al-Aslami asked the Messenger of Allah (ﷺ) thus:Messenger of Allah, I am a person devoted much to fasting. Should I fast during the journey? He (the Holy Prophet) said: Fast if you like and break it if you like
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: 13:132