Hadith 4:23
Anas reported God’s messenger as saying, “Every Muslim who dies of plague is credited with martyrdom.” (Bukhari and Muslim.)
وَعَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الطَّاعُونُ شَهَادَةٌ لكل مُسلم»
Original Reference: Mishkat al-Masabih 1545