Sahih Muslim 342
صحيح مسلم#342SahihIt is narrated on the authority of 'Abdullah b. Mas'ud that the Apostle (ﷺ) was asked about evil prompting, to which he replied:It is pure faith
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: 1:249