Riyad as-SalihinChapter 11Hadith 642
Full Sharh — Riyad as-Salihin 642
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)).
English Translation
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.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Jihad
Hadith Number
642