Sahih Bukhari Volume 4, Book 58, Hadith 3174

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا بِشْرٌ ـ هُوَ ابْنُ الْمُفَضَّلِ ـ حَدَّثَنَا يَحْيَى، عَنْ بُشَيْرِ بْنِ يَسَارٍ، عَنْ سَهْلِ بْنِ أَبِي حَثْمَةَ، قَالَ انْطَلَقَ عَبْدُ اللَّهِ بْنُ سَهْلٍ وَمُحَيِّصَةُ بْنُ مَسْعُودِ بْنِ زَيْدٍ إِلَى خَيْبَرَ، وَهْىَ يَوْمَئِذٍ صُلْحٌ، فَتَفَرَّقَا، فَأَتَى مُحَيِّصَةُ إِلَى عَبْدِ اللَّهِ بْنِ سَهْلٍ وَهْوَ يَتَشَحَّطُ فِي دَمٍ قَتِيلاً، فَدَفَنَهُ ثُمَّ قَدِمَ الْمَدِينَةَ، فَانْطَلَقَ عَبْدُ الرَّحْمَنِ بْنُ سَهْلٍ وَمُحَيِّصَةُ وَحُوَيِّصَةُ ابْنَا مَسْعُودٍ إِلَى النَّبِيِّ صلى الله عليه وسلم، فَذَهَبَ عَبْدُ الرَّحْمَنِ يَتَكَلَّمُ فَقَالَ ‏"‏ كَبِّرْ كَبِّرْ ‏"‏‏.‏ وَهْوَ أَحْدَثُ الْقَوْمِ، فَسَكَتَ فَتَكَلَّمَا فَقَالَ ‏"‏ أَتَحْلِفُونَ وَتَسْتَحِقُّونَ قَاتِلَكُمْ أَوْ صَاحِبَكُمْ ‏"‏‏.‏ قَالُوا وَكَيْفَ نَحْلِفُ وَلَمْ نَشْهَدْ وَلَمْ نَرَ قَالَ ‏"‏ فَتُبْرِيكُمْ يَهُودُ بِخَمْسِينَ ‏"‏‏.‏ فَقَالُوا كَيْفَ نَأْخُذُ أَيْمَانَ قَوْمٍ كُفَّارٍ فَعَقَلَهُ النَّبِيُّ صلى الله عليه وسلم مِنْ عِنْدِهِ‏

Narrated By Sahl bin Abi Hathma : 'Abdullah bin Sahl and Muhaiyisa bin Mas'ud bin Zaid set out to Khaibar, the inhabitants of which had a peace treaty with the Muslims at that time. They parted and later on Muhaiyisa came upon 'Abdullah bin Sah! and found him murdered agitating in his blood. He buried him and returned to Medina. 'Abdur Rahman bin Sahl, Muhaiyisa and Huwaiuisa, the sons of Mas'ud came to the Prophet and 'Abdur Rahman intended to talk, but the Prophet said (to him), "Let the eldest of you speak." as 'Abdur-Rahman was the youngest:. 'Abdur-Rahman kept silent and the other two spoke. The Prophet said, "If you swear as to who has committed the murder, you will have the right to take your right from the murderer." They said, "How should we swear if we did not witness the murder or see the murderer?" The Prophet said, "Then the Jews can clear themselves from the charge by taking Alaska (an oath taken by men that it was not they who committed the murder)." They said, "How should we believe in the oaths of infidels?" So, the Prophet himself paid the blood money (of 'Abdullah).