Ezekiel 43:25-27

For seven days you shall provide daily a male goat for a sin offering; also, a bull from the herd and a ram from the flock, without blemish, shall be provided. Seven days shall they make atonement for the altar and cleanse it, and so consecrate it. And when they have completed these days, then from the eighth day onward the priests shall offer on the altar your burnt offerings and your peace offerings, and I will accept you, declares the Lord GOD.”