Musnad Ahmad 30:648

'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from al-Zuhri, al-Agharr Abu 'Abd Allah, the companion of Abu Hurayrah, informed me, from Abu Hurayrah, who said: "When it is the day of Friday, the angels sit at the doors of the mosque, writing down everyone who comes to the Friday prayer. So when the Imam comes out, the angels fold their scrolls and enter to listen to the reminder." He said: And the Prophet, peace and blessings of Allah be upon him, said: "The one who goes early to the Friday prayer is like one who offers a camel as a sacrifice, then like one who offers a cow, then like one who offers a sheep, then like one who offers a chicken, then like one who offers - I think he said - an egg."