Hadith #4808 (Sahih Muslim)
Book: The Book on Government
Narrator(s): Hafsa bint Sirin حفصة بنت سيرين
Grade: Sahih

Anas b. Malik asked me the cause of death of Yahya b. ‘Abu ‘Amra. I said: (He died) of plague. He said: The Messenger of Allah (ﷺ) said that death by plague is martyrdom for a Muslim.

Source: https://parallelquran.com/hadith/sahih-muslim-4808/