Musannaf Ibn Abi Shayba 3:3504

Abu Usama narrated to us, from Abu al-Umays, from Ali ibn al-Aqmar, who said: Masruq and Urwah ibn al-Mughirah went out to a Bedouin settlement of theirs. He said: Then Friday (prayer) arrived, and they did not perform the Friday prayer. And the day of Fitr arrived, and they did not perform the Fitr (prayer).