Sunan an-Nasa'i 2261
سنن النسائي#2261SahihIt was narrated from a man, from Jabir that the Messenger of Allah said:"It is not righteousness to fast when traveling
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 22:172