Exodus 29 describes the ordination of the priests. Over seven days Aaron and his sons were washed, clothed in holy garments and anointed with oil. Then came three sacrifices: a bull for a sin offering, a ram for a burnt offering wholly given to God, and a ram of consecration for ordination. The priests laid their hands on the animals' heads, showing that the animal stood in their place. Even those chosen to serve needed atonement first.
Blood from the ordination ram was placed on the priests' right ear, right thumb and right big toe. This marked the whole person, hearing, working and walking, as devoted to God. Portions of the offerings were waved before God and then eaten by the priests in a holy place, a meal of fellowship with God. Romans 12:1 calls believers to present their bodies as a living sacrifice, holy and acceptable to God.
The chapter closes with the daily offering of two lambs, morning and evening, and God's great promise: I will dwell among the children of Israel, and will be their God. They shall know that I am Yahweh their God, who brought them out of the land of Egypt, that I might dwell among them (29:45-46). The exodus was not only freedom from slavery but freedom for fellowship with God. In the New Testament, Hebrews 10:11-14 explains that Christ offered one sacrifice for sins forever.