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.
tabarani:8584ʿUmar b. Ḥafṣ al-Sadūsī > ʿĀṣim b. ʿAlī > al-Masʿūdī > al-Aʿmash > Abū Wāʾil > ʿAbdullāh a man

[Machine] Abdullah heard a man saying, "Where are the ascetics in this worldly life and those who aspire for the Hereafter?" So Abdullah said, "Those are the companions of Al-Jabiyyah and they stipulated that five hundred Muslims should not return until they are killed." So they shaved their heads and confronted the enemy and were killed except for one who reported about them.  

الطبراني:٨٥٨٤حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ السَّدُوسِيُّ ثنا عَاصِمُ بْنُ عَلِيٍّ ثنا الْمَسْعُودِيُّ عَنِ الْأَعْمَشِ عَنْ أَبِي وَائِلٍ قَالَ

سَمِعَ عَبْدُ اللهِ رَجُلًا يَقُولُ أَيْنَ الزَّاهِدُونَ فِي الدُّنْيَا وَالرَّاغِبُونَ فِي الْآخِرَةِ؟ فَقَالَ عَبْدُ اللهِ «أُولَئِكَ أَصْحَابُ الْجَابِيَةِ وَاشْتَرَطَ خَمْسُ مِائَةٍ مِنَ الْمُسْلِمِينَ أَنْ لَا يَرْجِعُوا حَتَّى يُقْتَلُوا» فَحَلَقُوا رُءوسَهُمْ فَلَقُوا الْعَدُوَّ فَقُتِلُوا إِلَّا مُخْبِرٌ عَنْهُمْ