Mishkat al-Masabih 19 Jihad كتاب الجهاد 22

وَعَن سهل بن حنيف قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: ” مَنْ سَأَلَ اللَّهَ الشَّهَادَةَ بِصِدْقٍ بَلَّغَهُ اللَّهُ مَنَازِلَ الشُّهَدَاءِ وَإِنْ مَاتَ عَلَى فِرَاشِهِ. رَوَاهُ مُسلم

Sahl b. Hunaif reported God’s Messenger as saying, “If anyone asks God for martyrdom with a genuine purpose God will bring him to the dwellings of the martyrs, even if he dies on his bed.” Muslim transmitted it.