Sulayman bin Yasar (may Allah have mercy on him) narrates from the Companions of the Messenger (may Allah be pleased with them) that the Messenger of Allah (peace and blessings be upon him) kept the qasamah as it had been in the Jahiliyyah, and he judged by it when the Ansar claimed against the Jews the killing of their man.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسامة / 16442