Sahih Muslim 3098
صحيح مسلم#3098SahihMuhammad b. Abu Bakr reported:I said to Anas b. Malik in the morning of 'Arafa: What do you say as to pronouncing Talbiya on this day? He said: I travelled with Allah's Apostle (may peace he upon him) and his Companions in this journey. Some of us pronounced Takbir and some of us pronounced Tahlil, and none of us found fault with his companion
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: 15:303