Musannaf Ibn Abi Shayba 37:104

Abu Usama narrated to us, from al-Jurayri, who said: al-‘Ala’ narrated to us, from ‘Abd al-Rahman ibn Sakhr, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The Hour will not be established until tribes are swallowed up by the earth, until it is said of a man: 'He is from the tribe of so-and-so.'" He said: So I realized that the Arabs will be called by their tribes, and the non-Arabs will be called by their villages.