الكافي- ط الاسلامية, volume 7, page 360

Ali Bin Ibrahim, from his father, from one of his companions, from Aban Bin Usman, from the one who informed him, (It has been narrated) from one of the two (5 th or 6 th Imam asws ) having said: ‘They came to Umar Bin Al-Khattab with a man who had killed a brother of a man, so he handed him over to him, and ordered him with his killing. So the man struck him until he saw that he had killed him. So he carried him over to his house. So they found him to be barely alive. So they treated him and he was cured. So when he went out, the brother of the first killed one seized him, so he said, ‘You are the killer of my brother, and it is for me that I kill you’. So he said, ‘You have already killed me once’. So he went with him to Umar. So he ordered him to be killed. So he went out and was saying: ‘By Allah azwj ! I have already been killed once’. So they passed by Amir Al-Momineen asws . So they informed him asws of his news, so he asws said: ‘Do not be hasty until I asws come out to you’. So he asws went over to Umar, so he asws said: ‘The judgement regarding him is not like this!’ So he said, ‘And what is it, O Abu Al-Hassan asws ?’ So he asws said: ‘He has the right to do to the brother of the deceased what he has done to the killer, then he can subject the killer to retaliation for his deceased brother. Then he would be killed by his brother’. So the man (brother of the deceased) realised that if he retaliates, it would come upon his soul. So, he forgave him, and they both left’.

Translation: HubeAli — attributed by Thaqalayn·The Arabic above is the original.

Ali Bin Ibrahim, from his father, from Ibn Abu Umeyr, from Hammad, from Al Halby, (The narrator) says, ‘I asked Abu Abdullah asws about the compurgation (sworn endorsements), how it was to be?’ So he asws said: ‘It is truth, and it is written with us asws . And had it not been for that, the people would have killed each other, then nothing would happen. But rather, the compurgation (sworn endorsements) is a salvation for the people’.

Translation: HubeAli — attributed by Thaqalayn·The Arabic above is the original.

Ali Bin Ibrahim, from Muhammad Bin Isa, from Yunus, from Abdullah Bin Sinan who said, ‘I asked Abu Abdullah asws about the compurgation (sworn endorsements), did the Sunnah flow with regards to it?’ So he asws said: ‘Yes. Two men from the Helpers went out to collect fruits. So they separated, and one of the two was found to be dead. So his companion said to Rasool-Allah saww , ‘But rather, the Jews killed our companion’. So Rasool-Allah saww said: ‘The Jews should swear an oath’. So they said, ‘O Rasool-Allah saww ! How can we get the Jews to swear upon our brother, and they are an Infidel people?’ He saww said: ‘So you all swear an oath’. They said, ‘How can we swear upon what we do not know, and did not witness?’ He asws said: ‘So the Prophet saww paid him from himself saww ’. I said, ‘How did the compurgation (sworn endorsements) come to be?’ So he asws said: ‘But, it is the truth, and had it not been for that, the people would have killed each other. But rather, the compurgation (sworn endorsements) is a safeguard which the people are safeguarded by’.

Translation: HubeAli — attributed by Thaqalayn·The Arabic above is the original.