Sahih Muslim 1821
صحيح مسلم#1821SahihIbn 'Umar reported Allah's Apostle (ﷺ) as saying:Pray in your houses, and do not make them graves
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: 6:249