Sahih Muslim 1923
صحيح مسلم#1923SahihAbu Sa'id al-Khudri reported Allah's Messenger (ﷺ) as saying:No prayer is valid after the 'Asr prayer till the sun sets and no prayer is valid after the dawn prayer till the sun rises
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: 6:351