Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad-zuhd:1191ʿAbdullāh > Abū Bakr > Ḥātim b. Ismāʿīl > Ḥumayd b. Ṣakhr > Yazīd b. ʿAbdullāh b. Qusayṭ And Ṣafwān b. Sulaym

[Machine] Yazid bin Abdullah bin Qusayt and Safwan bin Sulaim narrated: "Whoever dies while in combat, dies as a martyr."  

الزهد لأحمد:١١٩١حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبُو بَكْرٍ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ عَنْ حُمَيْدِ بْنِ صَخْرٍ

عَنْ يَزِيدَ بْنِ عَبْدِ اللَّهِ بْنِ قُسَيْطٍ وَصَفْوَانَ بْنِ سُلَيْمٍ قَالَا مَنْ مَاتَ مُرَابِطًا مَاتَ شَهِيدًا