The Ordination Sin Offering

The priests are consecrated through a sin offering that addresses guilt before they can minister at the LORD’s altar.

Exodus 29:10-14 shows that even priests need atonement before serving the holy God. The bull offered for Aaron and his sons exposes the inadequacy of human mediators who themselves need cleansing. The gospel reveals Christ as the sinless high priest who does not need a sacrifice for himself but offers himself once for all to cleanse his people and secure true access to God.

This is not a direct life-of-Jesus narrative, but it prepares the canonical categories later fulfilled in Christ: priesthood, sin offering, blood, holiness, and outside-the-camp bearing of reproach. The passage should first be read within Israel's ordination rite, then seen as part of the larger scriptural movement toward the sinless priest and final sacrifice.

To command the sin offering for Aaron and his sons in the ordination ceremony, including identification with the bull, slaughter before the LORD, blood applied to the altar, altar purification, and the burning of the flesh outside the camp.

1. Why must Aaron and his sons offer a sin offering after being washed and clothed?
2. What does the laying on of hands teach about identification with the sacrifice?
3. Why is blood applied to the altar’s horns and poured at its base?
4. What does burning the flesh outside the camp communicate about sin and holiness?
5. How does this passage guard us from religious self-confidence?
6. How does Hebrews contrast Aaron’s need for sacrifice with Christ’s sinless priesthood?
7. Where might ministry activity be hiding an unconfessed need for cleansing?

Exodus 29 follows the priestly garment instructions of Exodus 28 and explains how Aaron and his sons are to be consecrated for ministry. Verses 1-9 introduce the ordination materials, washing, vesting, anointing, and priestly installation. Verses 10-14 then begin the sacrificial sequence with the bull of the sin offering, establishing that the priests themselves must be purified before they can serve at the altar on behalf of Israel.

After the initial ordination instructions, washing, clothing, and anointing of Aaron, the first sacrificial act in the ordination sequence is the bull for the sin offering. This prepares the priests and altar for the following burnt offering and ordination ram rituals.