Riyad as-Salihin, Book 12, Hadith 1321 (In-Book) ⓘ
Sahl bin Hunaif (May Allah be pleased with him) reported: The Messenger of Allah said, "He who supplicates Allah sincerely for martyrdom, Allah will elevate him to the station of the martyrs, even if he dies on his bed."[Muslim].
وعن سهل بن حنيف رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: "من سأل الله تعالى الشهادة بصدق بلغه الله منازل الشهداء وإن مات على فراشه" ((رواه مسلم)).