Ezekiel 43:25-27

25Seven days shalt thou offer daily a goat for a sin-offering; they shall also offer a young bullock, and a ram out of the flock without blemish. 26Seven days shall they make atonement for the altar and purify it, and consecrate it. 27And when these days are ended, it shall be that upon the eighth day and onwards the priests shall offer your burnt-offerings upon the altar, and your peace-offerings; and I will accept you, saith the Lord Jehovah.