ENOfficial
Anas reported God’s messenger as saying, “Every Muslim who dies of plague is credited with martyrdom.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الطَّاعُونُ شَهَادَةٌ لكل مُسلم»
sunnah.com