Ezekiel 43:26

and they shall make atonement for the altar, and shall purge it; and they shall consecrate themselves.

Seven days shall they purge the altar and purify it; and they shall consecrate themselves.

Seven days shall they make atonement for the altar and purify it. So shall they consecrate it.

Thus shall they seuen dayes purifie the altar, and clense it, and consecrate it.