Abdullah bin Abbas (may Allah be pleased with them both) narrates: An Ansari was found murdered near a well of the Jews in Khaybar. The people mentioned this matter to the Prophet Muhammad (peace be upon him). The Prophet (peace be upon him) sent a message to those people that they should bring fifty men, and each one of them should swear by name, saying: "I did not kill him, nor do I know anything about the killer." Then the Prophet (peace be upon him) made the payment of blood money obligatory upon them. So they said: This gentleman has given the same verdict as was in the law of Musa (Moses), peace be upon him.
Hadith Referenceسنن الدارقطني / كتاب فى الأقضية والأحكام وغير ذلك / 4518