Abu Raja' al-Utaridi (may Allah have mercy on him) narrates from Sayyiduna Atiq Abu Bakr al-Siddiq and Sayyiduna Imran bin Husayn al-Khuza'i (may Allah be pleased with them both); they both said that the Messenger of Allah (peace and blessings be upon him) said: "Whoever performs the ritual bath (ghusl) on the day of Jumu'ah, his sins and errors are expiated. Then when he starts walking, twenty good deeds are written for him for every step. Then when he finishes the prayer, he is rewarded with the deeds of two hundred years."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15383