Sahih Muslim 4883
صحيح مسلم#4883SahihIt has been reported on the authority of 'Amr b. al-'As that the Messenger of Allah (ﷺ) said:All the sins of a Shahid (martyr) are forgiven except debt
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: 33:179