Ibn al-Musayyib (may Allah have mercy on him) said: When Sayyiduna Umar (may Allah be pleased with him) performed his last Hajj, a Muslim man was killed among Banu Wadi'ah. Sayyiduna Umar (may Allah be pleased with him) sent to them, after he had completed the rites, and asked them whether they knew of a killer of this slain man among them. The people said no. So fifty elders were brought out from them to swear, and they were made to stand in the Hatim, and an oath was taken from them in these words: By Allah, the Lord of this Sacred House, the Lord of this Sacred City and the Lord of this Sacred Month, you did not kill him and you know of no killer of his. They swore to that, and Sayyiduna Umar (may Allah be pleased with him) imposed on them the heavy blood money (diyah mughallazah), in camels of specified ages, or in dinars and dirhams a blood money plus one third. One man among them, whose name was Sinan, said: "O Commander of the Believers, will my oath not suffice to spare my wealth?" He said: "No, I have only judged among you with the judgement of the Prophet of Allah (peace and blessings be upon him)." So they took his blood money in dinars: a blood money plus a third of a blood money.
Ali said: Umar bin Subh, in its chain, is matruk al-hadith (abandoned in hadith).
Al-Shaykh (al-Bayhaqi) (may Allah have mercy on him) said: Attributing it to the Prophet (peace and blessings be upon him) is munkar (rejected), and besides its break it comes through the narration of one whom they agreed to abandon. Al-Shafi'i said: The connected narration is more deserving of being taken than the broken one, and the Ansar know the hadith of their own man better than others. Al-Shafi'i said: It is also narrated from Umar (may Allah be pleased with him) that he began with the defendants, then returned the oaths to the claimants.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسامة / 16451