Jami` at-Tirmidhi 96
جامع الترمذي#96SahihSafwan bin Assal narrated:'When we were traveling, Allah's Messenger would order us not to remove our Khuff for three days and nights, except for Janabah, but not for defecating, urinating, and sleep
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan
Al-AlbaniHasan
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 1:96