Sahih Muslim 6568
صحيح مسلم#6568SahihAbu Sa'id and abu Huraira reported that they heard Allah's Messenger (ﷺ) as saying:Never a believer is stricken with discomfort, hardship or illness, grief or even with mental worry that his sins are not expiated for him
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: 45:66