Musannaf Ibn Abi Shayba 3:2682

Abu Bakr narrated to us, he said: Jarir narrated to us, from Mansur, from Talha, from Sa'id ibn Ubaydah, from Abu Abd al-Rahman, who said: Ali said: "There is no Jumu'ah, nor Tashriq, nor prayer of Fitr, nor Adha, except in a congregational city (misr jami') or a great city." Hajjaj said: And I heard 'Ata' saying the like of that.