Sirat Ibn Hisham 1232
The reason for the Messenger's expedition against them
[ مَوْتُ ابْنِ صُبَابَةَ في غزوة بني المصطلق ] وَقَدْ أُصِيبَ رَجُلٌ مِنْ الْمُسْلِمِينَ مِنْ بَنِي كَلْبِ بْنِ عَوْفِ بْنِ عَامِرِ بْنِ لَيْثِ بْنِ بَكْرٍ، يُقَالُ لَهُ: هِشَامُ بْنُ صُبَابَةَ، أَصَابَهُ رَجُلٌ مِنْ الْأَنْصَارِ مِنْ رَهْطِ عُبَادَةَ بْنِ الصَّامِتِ، وَهُوَ يَرَى أَنَّهُ مِنْ الْعَدُوِّ، فَقَتَلَهُ خَطَأٍ
Translation
✧ [The death of Ibn Ṣubābah in the expedition of Banū al-Muṣṭaliq] A man from the Muslims of Banū Kalb b. ʿAwf b. ʿĀmir b. Layth b. Bakr, called Hishām b. Ṣubābah, was struck by a man from the Anṣār, of the clan of ʿUbādah b. al-Ṣāmit, who thought he was one of the enemy, and killed him inadvertently.
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