Sahih Muslim 5652
صحيح مسلم#5652SahihAnas b. Malik reported Allah's Messenger (ﷺ) as saying:When the People of the Book offer you salutations, you should say: The same to you
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: 39:7