Sahl bin Abu Hathma (may Allah be pleased with him) and the elders of his tribe narrated that the Messenger of Allah (ﷺ) said to Huwayyisa, Muhayyisa, and Abdur Rahman: "You will take oaths and thus become entitled to your companion's blood." They said: "No." The Prophet (ﷺ) said: "Then the Jews will take oaths."
Hadith Referenceمسند الإمام الشافعي / كتاب العتق / 1676