Sahih Muslim 1891
صحيح مسلم#1891SahihUqba b. 'Amir reported Allah's Messenger (ﷺ) as saying:What wonderful verses have been sent down today. the like of which has never been seen! They are:" Say: I seek refuge with the Lord of the dawn," and" Say: I seek refuge with the Lord of men
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: 6:319