Abu Hurayrah (may Allah be pleased with him) says that the Prophet (peace and blessings be upon him) said: "On Friday, angels are present at the doors of the mosques, recording who came first. The one who comes first for Jumu'ah receives the reward of sacrificing a camel, and the one who comes after him that of a cow; then the one who comes after him that of a ram," until he also mentioned the hen and the egg, "and when the imam sits on the pulpit, they close their registers and come to attend the Friday sermon."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5860