Jami` at-Tirmidhi 539
جامع الترمذي#539SahihUmm Atiyyah narrated:"Allah's Messenger would order the virgins, the mature women, the secluded and the menstruating to go out for the two Eid. As for the menstruating women, they were to stay away from the Musalla and participate in the Muslims supplications." One of them said: 'O Messenger of Allah! What if she does not have a Jilbab? He said: 'Then let her sis lend her a Jilbab
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 ZaiIsnaad Sahih
In-book reference: 5:10