Abu Layla bin Abdullah bin Abd al-Rahman bin Sahl (may Allah have mercy on him) said that Sahl bin Abi Hathmah (may Allah be pleased with him) and the elders of his people informed him that the Messenger of Allah (peace and blessings be upon him) said to Huwayyisah, Muhayyisah and Abd al-Rahman (may Allah be pleased with them): "Take oaths and become entitled to the blood of your companion." They said: No. He (peace and blessings be upon him) said: "Then the Jews will take the oaths."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20732