Jami` at-Tirmidhi 712
جامع الترمذي#712SahihAbu Sa'eed (Al-Khudri) narrated:"We were on a journey with the Messenger of Allah during the month of Ramadan. No one objected to the fast of the one fasting nor the fast breaking of the one who broke his fast
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 8:31