ʿAbdullah bin Sahl and Muhaiyisa bin Masʿud 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 ʿAbdullah bin Sah! and found him murdered agitating in his blood. He buried him and returned to Medina. ʿAbdur Rahman bin Sahl, Muhaiyisa and Huwaiuisa, the sons of Masʿud came to the Prophet ﷺ and ʿAbdur Rahman intended to talk, but the Prophet ﷺ said (to him), "Let the eldest of you speak." as ʿAbdur-Rahman was the youngest:. ʿAbdur-Rahman kept silent and the other two spoke. The Prophet ﷺ 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 ﷺ 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)." The!y said, "How should we believe in the oaths of infidels?" So, the Prophet ﷺ himself paid the blood money (of ʿAbdullah). (See Hadith No. 36 Vol. 9.)  

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 ﷺ 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 ﷺ مِنْ عِنْدِهِ