Amr bin Shu'ayb (may Allah have mercy on him) narrates from the Messenger of Allah (peace and blessings be upon him) that he executed, on the basis of qasamah, a man of Banu Nasr bin Malik at Bahrat al-Ri'a on the bank of Liyyah, and he said: "The killer and the slain are both from among them."
This is munqati' (broken).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسامة / 16457