Sahih Bukhari Volume 007, Book 068, Hadith Number 479.
Narrated By Abu 'Ubaid : (In continuation of 478). Then I witnessed the 'Id with 'Uthman bin 'Affan, and that was on a Friday. He offered the prayer before the sermon, saying, "O people! Today you have two 'Its (festivals) together, so whoever of those who live at Al-'Awali (suburbs) would like to wait for the Jumua prayer, he may wait, and whoever would like to return (home) Is granted my permission to do so." Then I witnessed (the 'Its) with 'Ali bin Abi Talib, and he too offered the 'Id prayer before the sermon and then delivered the sermon before the people and said, "Allah's Apostle has forbidden you to eat the meat of your sacrifices for more than three days."