There are verses in these last books that seem to expand on each others laws. I think the best example is verses like Leviticus 20:9 and Deuteronomy 21:18–21,where they both talk about the punishment of son who done wrong to their parents. However, Leviticus is short, while Deuteronomy seems to expand on Leviticus and be more detailed. So are these last books laws related and expand on each other or their their own laws separately?

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Deuteronomy is Moses' farewell speech. As such, it is not intended to present any new laws, but rather to emphasize and clarify those laws which needed emphasis and/or clarification.

Deuteronomy 24:5

And Moses the servant of the LORD died there in Moab, as the LORD had said.


Short Answer: The books of Leviticus, Numbers, and Deuteronomy, part of the Torah (or Pentateuch), contain a multitude of laws and commandments. Here's the thing that mainly connects them:

All the books of the Torah have traditionally been attributed to Moses, who is the leading character in four of them, excluding Genesis. [see this previous question]

So, while they are distinct books with distinct differences, they are interconnected in many ways, especially being that Moses is the leading figure in four of them.

Take this for example, in Leviticus and Deuteronomy:

Moses restates many of the social laws and rules of conduct outlined in Leviticus, adding a few new laws, such as the requirement for the Israelites to cancel debts every seven years. [2]

Leviticus primarily focuses on religious laws and rituals, particularly those related to the priesthood and the sacrificial system. Deuteronomy, on the other hand, is presented as a series of speeches by Moses and it includes a mixture of historical narrative, prophecy, and law.

A couple of scriptures that add onto each other might include:

    • Laws about Sacrifices: Leviticus chapters 1-7 provide detailed instructions about different types of sacrifices. Numbers 15:1-16 further elaborates on these laws by providing additional instructions for offerings.
    • Laws about Cleanliness: Leviticus chapters 11-15 outline various conditions that can make a person unclean. Numbers 19 provides further instructions about the purification process.
    • Laws about Festivals: Leviticus 23 provides a list of religious festivals to be observed. Numbers 28-29 gives additional instructions about offerings to be made during these festivals.
    • Laws about Blasphemy: Leviticus 24:10-23 narrates an incident of blasphemy and prescribes the punishment. Deuteronomy 13:1-18 expands on this by providing laws about false prophets and idolaters.
    • Laws about Punishment for Disobedience: Leviticus 26 outlines blessings for obedience and curses for disobedience. Deuteronomy 28 repeats and expands on these blessings and curses.
    • Laws about the Priesthood: Leviticus 8-10 describes the consecration of Aaron and his sons as priests. Numbers 3-4 assigns specific duties to the Levites.

In conclusion: while the laws in Leviticus, Numbers, and Deuteronomy are interconnected and can expand on each other in certain areas, they also stand as their own separate entities within the Torah.


Deuteronomy could be considered as Moses's annotated version of the previously stated laws.

Deuteronomy (n.)

5th book of the Pentateuch, late 14c., Deutronomye (Wycliffe), from Late Latin Deuteronomium, from Ecclesiastical Greek Deuteronomion, literally "second law," from deuteros "second" (see deutero-) + nomos "law" (from PIE root *nem- "assign, allot; take").

A mistranslation of Hebrew mishneh hattorah hazzoth "a copy of this law" [Deuteronomy xvii.18]. The book is a repetition, with comments, of the Decalogue and most of the laws of Exodus. The title was translated literally into Old English as æfteræ, literally "after-law" (see ae).

Related: Deuteronomic; Deuteronomical.

deuteronomy | Search Online Etymology Dictionary

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