Sahih al-Bukhari 2703
Narrated Anas:
Ar-Rabi, the daughter of An-Nadr broke the tooth of a girl, and the relatives of Ar-Rabi` requested the 
girl's relatives to accept the Irsh (compensation for wounds etc.) and forgive (the offender), but they 
refused. So, they went to the Prophet (ﷺ) who ordered them to bring about retaliation. Anas bin An-Nadr 
asked, "O Allah"; Apostle! Will the tooth of Ar-Rabi` be broken? No, by Him Who has sent you with 
the Truth, her tooth will not be broken." The Prophet (ﷺ) said, "O Anas! Allah"; law ordains retaliation." 
Later the relatives of the girl agreed and forgave her. The Prophet (ﷺ) said, "There are some of Allah's 
slaves who, if they take an oath by Allah, are responded to by Allah i.e. their oath is fulfilled). Anas 
added, "The people agreed and accepted the Irsh."
حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ الأَنْصَارِيُّ، قَالَ حَدَّثَنِي حُمَيْدٌ، أَنَّ أَنَسًا، حَدَّثَهُمْ أَنَّ الرُّبَيِّعَ ـ وَهْىَ ابْنَةُ النَّضْرِ ـ كَسَرَتْ ثَنِيَّةَ جَارِيَةٍ، فَطَلَبُوا الأَرْشَ وَطَلَبُوا الْعَفْوَ، فَأَبَوْا فَأَتَوُا النَّبِيَّ صلى الله عليه وسلم فَأَمَرَهُمْ بِالْقِصَاصِ‏.‏ فَقَالَ أَنَسُ بْنُ النَّضْرِ أَتُكْسَرُ ثَنِيَّةُ الرُّبَيِّعِ يَا رَسُولَ اللَّهِ لاَ وَالَّذِي بَعَثَكَ بِالْحَقِّ لاَ تُكْسَرُ ثَنِيَّتُهَا فَقَالَ ‏"‏ يَا أَنَسُ كِتَابُ اللَّهِ الْقِصَاصُ ‏"‏‏.‏ فَرَضِيَ الْقَوْمُ وَعَفَوْا فَقَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ إِنَّ مِنْ عِبَادِ اللَّهِ مَنْ لَوْ أَقْسَمَ عَلَى اللَّهِ لأَبَرَّهُ ‏"‏‏.‏ زَادَ الْفَزَارِيُّ عَنْ حُمَيْدٍ عَنْ أَنَسٍ فَرَضِيَ الْقَوْمُ وَقَبِلُوا الأَرْشَ‏.‏