Sahih Muslim 159
صحيح مسلم#159SahihIt is narrated on the authority of Sufyan b. 'Abdulla al-Thaqafi that he said:I asked the Messenger of Allah to tell me about Islam a thing which might dispense with the necessity of my asking anybody after you. In the hadith of Abu Usama the (words) are: other than you. He (the Holy Prophet) remarked: Say I affirm my faith in Allah and then remain steadfast to it
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: 1:66