Sahih Muslim 376
صحيح مسلم#376SahihIt is narrated on the authority of Anas that the Messenger of Allah (ﷺ) said:"The Hour (Resurrection) will not occur as long as anyone says: 'Allah, Allah
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: 1:283