Riyad as-Salihin 1321
Sahl bin Hunaif (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) 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)‏‏)‏‏.‏