Sahih Muslim 1975
صحيح مسلم#1975SahihAbu Burda b. Abu Musa al-Ash'ari reported:'Abdullah b. Umar said to me: Did you hear anything from your father narrating something from the messenger of Allah (ﷺ) about the time on Friday? I said: Yes, I heard him say from the Messenger of Allah (ﷺ) (these words):" It is between the time when the Imam sits down and the end of the prayer
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: 7:25