Ezekiel 43:26
King James Version
“Seven days shall they purge the altar and purify it; and they shall consecrate themselves.”
Context
23When thou hast made an end of cleansing thou shalt offer a young bullock without blemish, and a ram out of the flock without blemish.
24And thou shalt offer them before the LORD, and the priests shall cast salt upon them, and they shall offer them up a burnt offering unto the LORD.
25Seven days shalt thou prepare every day a goat a sin offering: they shall also prepare a young bullock, and a ram out of the flock, without blemish.
26Seven days shall they purge the altar and purify it; and they shall consecrate themselves.
27And when these days are expired, it shall be, upon the eighth day, and forward, the priests shall make your burnt offerings upon the altar, and your peace offerings; and I will accept you, saith the Lord GOD.