In Exodus 29:1-35, the consecration ritual for priests is detailed; here Moses begins that ritual by washing Aaron and his sons.

Exodus 29:4 gives the same command earlier—this is a repetition of the washing instruction for consecration.

Exodus 29:35 gives the detailed ordination instructions now being enacted — seven days of consecration for Aaron and his sons.

Leviticus 8:1-13 details the actual execution of this command—the washing of Aaron and his sons as part of their consecration.

Leviticus 8:2 commands Moses to bring Aaron and his sons with offerings — the start of the consecration ceremony.

Leviticus 8:6 records Moses washing Aaron and his sons — the exact action commanded here.

Leviticus 9:1-24 shows the result: after washing, Aaron and his sons begin their priestly ministry with sacrifices.

Hebrews 9:10 calls these OT washings temporary bodily regulations — interpreting them as shadows of the new covenant.

Leviticus 16:4 requires the high priest to wash before the Day of Atonement — a similar but distinct ritual washing.

Numbers 8:9 brings Levites to the tent for purification — a parallel action but with a different group (Levites not priests).