Musnad Ahmad 962:171

Hujayn ibn al-Muthanna narrated to us, Abd al-Aziz—meaning Ibn Abi Salamah al-Majishun—narrated to us, from Umar ibn Abd al-Rahman ibn Atiyyah ibn Dallaf al-Muzani—I do not know him except that he narrated it—from Abu Umamah, raising it to the Prophet (peace and blessings of Allah be upon him), who said: "The Beast will emerge and mark the people upon their noses. Then they will remain among you until a man buys a camel and says, 'From whom did you buy it?' He will say, 'I bought it from one of the marked ones.'" And Yunus—meaning Ibn Muhammad—said: "Then they will remain among you," and he did not express doubt. He said: So he raised it.