his paternal aunt broke the front tooth of a girl and the Prophet of Allah decreed retaliation. Her brother, Anas bin An-Nadr, said: "Will you break the front tooth of so and so? No, by the One Who sent you with the truth, the front tooth of so and so will not be broken!" Before that, they had asked her family for forgiveness and blood money. When her brother - who was the paternal uncle of Anas and was martyred at Uhud - swore that oath, the people agreed to forgive. The Prophet said: "There are among the slaves of Allah who, if they swear by Allah, Allah fulfills their oath." (Using translation from Nasāʾī 4756)
أَنَّ عَمَّتَهُ كَسَرَتْ ثَنِيَّةَ جَارِيَةٍ فَقَضَى نَبِيُّ اللهِ ﷺ بِالْقِصَاصِ فَقَالَ أَخُوهَا أَنَسُ بْنُ النَّضْرِ تُكْسَرُ ثَنِيَّةُ فُلَانَةَ؟ لَا وَالَّذِي بَعَثَكَ بِالْحَقِّ لَا تُكْسَرُ ثَنِيَّةُ فُلَانَةَ قَالَ وَكَانُوا قَبْلَ ذَلِكَ سَأَلُوا أَهْلَهَا الْعَفْوَ وَالْأَرْشَ فَلَمَّا حَلَفَ أَخُوهَا وَهُوَ عَمُّ أَنَسٍ وَهُوَ الشَّهِيدُ يَوْمَ أُحُدٍ رَضِيَ الْقَوْمُ بِالْعَفْوِ قَالَ النَّبِيُّ ﷺ «إِنَّ مِنْ عِبَادِ اللهِ مَنْ لَوْ أَقْسَمَ عَلَى اللهِ لَأَبَرَّهُ»