Exodus 29:35-37 New American Bible (Revised Edition) (NABRE)
35 Carry out all these commands in regard to Aaron and his sons just as I have given them to you. Seven days you shall spend installing them, 36 sacrificing a bull each day as a purification offering, to make atonement. Thus you shall purify the altar[a] by purging it, and you shall anoint it in order to consecrate it. 37 Seven days you shall spend in purging the altar and in consecrating it. Then the altar will be most sacred, and whatever touches it will become sacred.