Musannaf Ibn Abi Shayba 18:1094

Abu Bakr narrated to us, he said: Al-Fadl ibn Dukayn narrated to us, from Sa’id ibn ‘Ubayd, from Bashir ibn Yasar, who claimed that a man from the Ansar called Sahl ibn Abi Hathma informed him that a group of his people went to Khaybar and dispersed within it. They found one of their number killed. They said to those among whom they found him, "You killed our companion." They said, "We did not kill him, nor do we know [who did]." They went to the Prophet of Allah, may Allah bless him and grant him peace, and said, "O Prophet of Allah, we went to Khaybar and found one of our number killed." The Messenger of Allah, may Allah bless him and grant him peace, said, "The eldest, the eldest." He said to them, "Will you bring evidence against those who killed him?" They said, "We have no evidence." He said, "Then they will swear an oath to you." They said, "We are not satisfied with the oaths of the Jews." The Prophet of Allah, may Allah bless him and grant him peace, disliked that his blood should go unavenged, so he paid his blood money with one hundred of the camels of the Sadaqah.