Leviticus 1:1 - 5:13
The book of Leviticus is largely one of instruction from God for the priests, which sequentially followed the giving of God’s laws. In these first chapters God provides instructions for the handling of various sacrifices, and what are appropriate sacrifices in different cases.
In Exodus 4:25 the wife of Moses called him a “husband of blood” after God confronted Moses, and the blood of their son’s circumcision appeased the Lord. She might have said “you and your bloody religion!”, which we will see repeated and repeated throughout this book of Leviticus with blood sacrifices. All of this is confirmed by the writer of Hebrews, who pointed that in Hebrews 9:22 that without the shedding of blood there is no remission of sins.
Everything in this book will point to Jesus in various ways. It was also designed by God to make obvious to the Jews that such sacrifices were not sufficient to remove sin, since such sinning continued to happen, and more sacrifices were needed year after year after year.
A greater sacrifice was needed in order to remove sin, which would only happen with the death and resurrection of Jesus Christ, Who would only die once, and thus remove the need for further blood sacrifices to temporarily cover the sins of people.