³⁵ The ordination period is to last for seven days. Here is what you must do to ordain Aaron and his sons to My priestly service. ³⁶ Offer a bull as an offering every day for seven days to purify them from sin. Cleanse the altar and consecrate it by anointing it with oil. ³⁷ For seven days you must purify the altar and consecrate it. As a result of these rituals it will be most holy and anything that touches the altar will become holy.