Leviticus can also be called “The Book of the Law of the Priests” as it contains very little historical matter, concerning itself with priestly legislation and the practice of the Law among the people. Much importance is placed upon Israel’s separation from all heathen influences so that the nation may retain its religious purity.

Leviticus 4

4:21 And he shall carry forth the bullock without the camp, and burn him as he burned the first bullock: it is a sin offering for the congregation.