Sunan An-Nasa'i

It was narrated from Sahl bin Abi Hathmah that:'Abdullah bin Sahi Al-Anasri and Muhayysah bin Mas'ud went out to Khaibar and went their separate ways to go about their business. 'Abdullah bin Sahl Al-Anasari was killed and Muhayysah. 'Abdur-Rahman, who was the brother of the victim, and Huwayysah, came to the Messenger of Allah. 'Abdur-Rahman started to speak, but the prophert said to him: ""Let the elders speak first."" So Muhayysah and Huwayysah spoke and told him about the case of 'Abdullah bin Sahl. The Messenger of Allah said: ""Will you swear fifty oaths, then you will receive compensation or be entitled to retaliate?"" They said: ""How can we swear an oath when we did not witness (what happened) and we were not there?"" The Messenger of Allah said: ""Then can the Jews swear fifty oaths declaring their innocence?"" They said: ""O Messenger of Allah, how can we accept the oath of a disbelieving people?"" So the Messenger of Allah paid the blood money himself. (One of the narrators) Bushair said: 'One of those camels kicked me in a Mirbad of ours