Old Testament both Jews and Christians have always interpreted the Bible (both the "Old" and "New" Testaments) as an affirmation of the oneness of Almighty God. The Old Testament stresses the special relationship between God and his chosen people, Israel, but includes instructions for proselytes as well. This relationship is expressed in the biblical covenant (contract) between the two, received by Moses. The law codes in books such as Exodus and especially Deuteronomy are the terms of the contract: Israel swears faithfulness to God, and God swears to be Israel's special protector and supporter. Further themes in the Old Testament include salvation,
Book of Leviticus have concluded that the Pentateuch received its final form during the Persian period (538–332 BC). Nevertheless, Leviticus had a long period of growth before reaching that form. The entire book of Leviticus is composed of Priestly literature. Most scholars see chapters 1–16 (the Priestly code) and chapters 17–26 (the Holiness code) as the work of two related schools, but while the Holiness material employs the same technical terms as the Priestly code, it broadens their meaning from pure ritual to the theological and moral, turning the ritual of the Priestly code into a model for the relationship of Israel to