Musannaf Ibn Abi Shayba 3:3502

Mu'tamir ibn Sulayman al-Raqqi narrated to us, from Hajjaj, from al-Hakam, who said: Umar ibn Abd al-Aziz wrote to the people of the villages, commanding them to perform the prayer for al-Fitr and al-Adha, and to perform the Jumu'ah prayer.