Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that the Messenger of Allah (peace and blessings be upon him) said: "When it is Friday, the angels stand at the doors of the mosque and record the reward of those who come first. For the one who comes early it is like the reward of sacrificing a camel, then for the one who comes after him the reward of sacrificing a cow, then for the one who comes after him the reward of sacrificing a ram, then for the one who comes after him like the reward of a hen, then for the one who comes after him the reward of an egg. When the imam comes out for the sermon, they roll up their registers and listen to the remembrance."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5862