We were at Al-Ahwaz fighting the Al-Haruriya (tribe). While I was at the bank of a river a man was praying and the reins of his animal were in his hands and the animal was struggling and he was following the animal. (Shuʿba, a sub-narrator, said that man was Abu Barza Al-Aslami). A man from the Khawarij said, "O Allah! Be harsh to this sheik." And when the sheik (Abu Barza) finished his prayer, he said, "I heard your remark. No doubt, I participated with Messenger of Allah ﷺ in six or seven or eight holy battles and saw his leniency, and no doubt, I would rather retain my animal than let it return to its stable, as it would cause me much trouble. " (Using translation from Bukhārī 1211)
كُنَّا بِالْأَهْوَازِ نُقَاتِلُ الْحَرُورِيَّةَ فَبَيْنَا أَنَا عَلَى جُرُفِ نَهَرٍ إِذَا رَجُلٌ يُصَلِّي وَإِذَا لِجَامُ دَابَّتِهِ بِيَدِهِ فَجَعَلَتِ الدَّابَّةُ تُنَازِعُهُ وَجَعَلَ يَتْبَعُهَا قَالَ شُعْبَةُ هُوَ أَبُو بَرْزَةَ الْأَسْلَمِيُّ قَالَ وَجَعَلَ رَجُلٌ مِنَ الْخَوَارِجِ يَقُولُ اللهُمَّ افْعَلْ بِهَذَا الشَّيْخِ فَلَمَّا انْصَرَفَ الشَّيْخُ قَالَ إِنِّي سَمِعْتُ قَوْلَكُمْ وَإِنِّي قَدْ غَزَوْتُ مَعَ رَسُولِ اللهِ ﷺ سِتَّ غَزَوَاتٍ أَوْ سَبْعَ غَزَوَاتٍ أَوْ ثَمَانِ غَزَوَاتٍ وَشَهِدْتُ تَيْسِيرَ النَّبِيِّ ﷺ وَلَأَنْ كُنْتُ أَرْجِعُ مَعَ دَابَّتِي أَحَبُّ إِلَيَّ مِنْ أَنْ أَدَعَهَا تَذْهَبُ إِلَى مَأْلَفِهَا فَيَشُقَّ عَلَيَّ