37 For seven days make atonement for the altar and consecrate it. Then the altar will be most holy, and whatever touches it will be holy.

Read Exodus 29:37 Using Other Translations

Seven days thou shalt make an atonement for the altar, and sanctify it; and it shall be an altar most holy: whatsoever toucheth the altar shall be holy.
Seven days you shall make atonement for the altar and consecrate it, and the altar shall be most holy. Whatever touches the altar shall become holy.
Purify the altar, and consecrate it every day for seven days. After that, the altar will be absolutely holy, and whatever touches it will become holy.