Sahih Muslim 681
صحيح مسلم#681SahihMaimuna (the wife of the Holy Prophet) reported:The Messenger of Allah (ﷺ) contacted and embraced his wives over the waist-wrapper when they were menstruating
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: 3:3