Mukhtasar Bukhari

Narrated Abu Huraira (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said: "When it is Friday, angels stand at every door of the mosque and record the names of those who come, in order of their arrival. The one who comes first, then the one who comes after him, and so on. When the Imam sits (on the pulpit), they close their registers and come to listen to the sermon."