Sahih Muslim
Sahih Muslim 1673 d
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
Arabic hadith text
حَدَّثَنَا أَحْمَدُ بْنُ عُثْمَانَ النَّوْفَلِيُّ، حَدَّثَنَا قُرَيْشُ بْنُ أَنَسٍ، عَنِ ابْنِ عَوْنٍ، عَنْ مُحَمَّدِ، بْنِ سِيرِينَ عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، أَنَّرَجُلاً، عَضَّ يَدَ رَجُلٍ فَانْتَزَعَ يَدَهُ فَسَقَطَتْ ثَنِيَّتُهُ أَوْ ثَنَايَاهُ فَاسْتَعْدَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَا تَأْمُرُنِي تَأْمُرُنِي أَنْ آمُرَهُ أَنْ يَدَعَ يَدَهُ فِي فِيكَ تَقْضَمُهَا كَمَا يَقْضَمُ الْفَحْلُ ادْفَعْ يَدَكَ حَتَّى يَعَضَّهَا ثُمَّ انْتَزِعْهَا "
Translation
'Imran b. Husain reported that a person bit the hand of a person. He withdrew his hand and his foretooth or foreteeth fell down. He (the man who lost his teeth) referred the matter to Allah's Messenger (ﷺ) and he said, What do you want me to do? Do you ask me that I should order him to put his hand in your mouth, and you should bite it as the camel bites? (If you want retaliation, then the only way out is) that you put your hand in his mouth (allow him) to bite that and then draw it away.