Sunan Ibn Majah, Book 24, Hadith 2903 (In-Book) ⓘ
Sahl bin Abu Umamah bin Sahl bin Hunaif narrated from his father, from his grandfather that the Prophet said: “Whoever asks Allah for martyrdom, sincerely from his heart, Allah will cause him to reach the status of the martyrs even if he dies in his bed.”
حَدَّثَنَا حَرْمَلَةُ بْنُ يَحْيَى، وَأَحْمَدُ بْنُ عِيسَى الْمِصْرِيَّانِ، قَالاَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، حَدَّثَنِي أَبُو شُرَيْحٍ عَبْدُ الرَّحْمَنِ بْنُ شُرَيْحٍ، أَنَّ سَهْلَ بْنَ أَبِي أُمَامَةَ بْنِ سَهْلِ بْنِ حُنَيْفٍ، حَدَّثَهُ عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " مَنْ سَأَلَ اللَّهَ الشَّهَادَةَ بِصِدْقٍ مِنْ قَلْبِهِ بَلَّغَهُ اللَّهُ مَنَازِلَ الشُّهَدَاءِ وَإِنْ مَاتَ عَلَى فِرَاشِهِ " .
also referenced under: Hadith 2797 (Reference) & Volume 4, Book 24, Hadith 2797 (DarusSalam)