Sahih al-Bukhari 5734
صحيح البخاري#5734SahihNarrated `Aisha:(the wife of the Prophet) that she asked Allah's Messenger (ﷺ) about plague, and Allah's Messenger (ﷺ) informed her saying, "Plague was a punishment which Allah used to send on whom He wished, but Allah made it a blessing for the believers. None (among the believers) remains patient in a land in which plague has broken out and considers that nothing will befall him except what Allah has ordained for him, but that Allah will grant him a reward similar to that of a martyr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 76:49