Sahih Muslim 4695
صحيح مسلم#4695SahihIt has been narrated on the authority of Buraida (who heard the tradition from his father) that the Messenger of Allah (ﷺ) conducted nineteen military campaigns and he (actually) fought in eight of them
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: 32:177