"I read the letter of the Messenger of allah which he wrote for 'Amr bin Hazm when he sent him to govern Najran. The letter was with Abu Bakr bin Hazm. The Messenger of Allah wrote this; 'A statement from Allah and His Messenger; O you who believe! Fulfill (your) obligations, and he wrote the Verses until he reached. Verily, Allah is Swift in reckoning. Then he wrote: 'this is the book if retaliation: For a soul, one hundred camels, '''' and so on (Using translation from Nasāʾī 4855)  

قَرَأْتُ كِتَابَ رَسُولِ اللهِ ﷺ الَّذِي كَتَبَ لِعَمْرِو بْنِ حَزْمٍ حِينَ بَعَثَهُ عَلَى نَجْرَانَ وَكَانَ الْكِتَابُ عِنْدَ أَبِي بَكْرِ بْنِ حَزْمٍ فَكَتَبَ رَسُولُ اللهِ ﷺ هَذَا بَيَانٌ مِنَ اللهِ وَرَسُولِهِ {يَا أَيُّهَا الَّذِينَ آمَنُوا أَوْفُوا بِالْعُقُودِ} [المائدة 1] فَكَتَبَ الْآيَاتِ مِنْهَا حَتَّى بَلَغَ {إِنَّ اللهَ سَرِيعُ الْحِسَابِ} [آل عمران 199] ثُمَّ كَتَبَ هَذَا كِتَابُ الْجِرَاحِ فِي النَّفْسِ مِائَةٌ مِنَ الْإِبِلِ نَحْوَهُ