It is narrated from Abu Huraira (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When it is Friday, the angels sit at the doors of the mosque." A longer hadith is mentioned further.
Hadith Referenceمسند الإمام الشافعي / كتاب الجمعة / 419
Hadith Takhrijاخرجہ مسلم، الجمعۃ، باب فضل التہجیر یوم الجمعۃ (850)۔