Ezekiel 43:25-27

251For seven days you shall prepare daily a goat for a sin offering; also a young bull and a ram from the flock, without blemish, shall be prepared.

26For seven days they shall make atonement for the altar and purify it; so shall they 2consecrate it.

27When they have completed the days, it shall be that on the 3eighth day and onward, the priests shall 4offer your burnt offerings on the altar, and your 5peace offerings; and I will 6accept you,’ declares the Lord God.”