If a person attacks another person's life and limb, and the other defends himself and kills him or injures him, there is no penalty on him
حَدَّثَنِي أَبُو غَسَّانَ الْمِسْمَعِيُّ، حَدَّثَنَا مُعَاذُ بْنُ هِشَامٍ، حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، عَنْ بُدَيْلٍ، عَنْ عَطَاءِ بْنِ أَبِي رَبَاحٍ، عَنْ صَفْوَانَ بْنِ يَعْلَى، أَنَّ أَجِيرًا، لِيَعْلَى ابْنِ مُنْيَةَ عَضَّ رَجُلٌ ذِرَاعَهُ فَجَذَبَهَا فَسَقَطَتْ ثَنِيَّتُهُ فَرُفِعَ إِلَى النَّبِيِّ صلى الله عليه وسلم فَأَبْطَلَهَا وَقَالَ " أَرَدْتَ أَنْ تَقْضَمَهَا كَمَا يَقْضَمُ الْفَحْلُ " .
Safwan b. Ya'la reported that a person bit the arm of the servant of Ya'la b. Munya. He pulled it and his foretooth fell. The matter was referred to Allah's Messenger (ﷺ) and he turned it down and said: Did you intend to bite his hand, as the camel bites?