There are several passages in the Old Testament that clearly indicate animal sacrifice will be re-instituted during the millennial kingdom. Some passages mention it in passing as the topic of the millennial kingdom is discussed, passages like Isaiah 56:6-8; Zechariah 14:16; and Jeremiah 33:15-18.
The passage that is the most extensive, giving the greatest detail, is Ezekiel 43:18-46:24. It should be noted that this is part of a greater passage dealing with the millennial kingdom, a passage that begins with Ezekiel 40. In Ezekiel 40, YHWH begins to give details of the temple that will exist during the millennial kingdom, a temple that dwarfs all other temples previously built, even Herod’s temple that was quite large, which existed during the earthly ministry of Messiah Yahusha.
After giving details concerning the size and appearance of the temple and the altar, YHWH then begins to give detailed instruction as to the animal sacrifices that will be offered (Ezekiel 43:18-27).
In chapter 44, YHWH gives instructions as to who will be offering sacrifices to YHWH. YHWH states that all of the Levites will not be offering blood and fat to YHWH due to previous sin; it will be those from the lineage of Zadok (verse 15). Chapters 45 and 46 continue to mention that animal sacrifices will be made.
The primary objection made to the idea of animal sacrifices returning during the millennial kingdom is that Messiah Yahusha has come and offered a perfect sacrifice for sin, and there is therefore no need to sacrifice animals for sin. However, it must be remembered that animal sacrifice never removed the sin that spiritually separated a person from YHWH.
Hebrews 10:1-4 “For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect. For then would they not have ceased to be offered? because that the worshippers once purged should have had no more conscience of sins. But in those sacrifices there is a remembrance again made of sins every year. For it is not possible that the blood of bulls and of goats should take away sins.”
It is incorrect to think that animal sacrifices took away sins in the Old Testament, and it is incorrect to think they will do so in the millennial kingdom. Animal sacrifices served as object lessons for the sinner, that sin was and is a horrible offense against Yahuah Elohim, and that the wages of sin is death. Romans 3:20 “Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.”
As we review the matter, we can all agree that the purpose of animal sacrifice during the millennial kingdom is memorial in nature.
As the Master’s Last Supper is a reminder of the death of Messiah to the Remnant today, animal sacrifices will be a reminder during the millennial kingdom.
To those born during the millennial kingdom, animal sacrifices will again be an object lesson. During that future time, righteousness and holiness will prevail, but those with earthly bodies will still have a sin nature, and there will be a need to teach about how offensive sin is to a holy and righteous Elohim.
Animal sacrifices will serve that purpose, “but in those sacrifices there is a reminder of sins year by year” (Hebrews 10:3).