Ezekiel 44:24

The Zadokite priests were also to serve as judges for the people and to make decisions in harmony with the Lord’s laws (cf. Deuteronomy 17:9; Deuteronomy 19:17; Deuteronomy 21:5). Not only will the prince serve as an administrator under Messiah (Ezekiel 44:3), but the priests will also serve under His authority. [Note: See Douglas K. Stuart, "The Prophetic Ideal of Government in the Restoration Era," in Israel’s Apostasy and Restoration: Essays in Honor of Roland K. Harrison, pp. 283-305.] They themselves would have to keep His laws and His rules concerning the appointed feasts, and they would have to observe the Sabbath Day. While observance of the Sabbath Day is not part of the New Covenant law of Christ, God will reinstitute it during the kingdom dispensation.

What God told people they could eat in various dispensations also differed. Before the Fall, God told Adam and Eve that they could eat any plants in the Garden of Eden except the fruit of the tree of the knowledge of good and evil (Genesis 1:29; Genesis 2:17-18). After the Fall, they and their descendants continued to be vegetarians. Then He told Noah that he and his descendants could eat animals as well as plants (Genesis 9:3). Under the Mosaic Law God proscribed certain foods as unclean. But later Christ declared all foods clean (Mark 7:19; cf. 1 Timothy 4:3). Even though the Sabbath Day was the sign of the Mosaic Covenant (Exodus 31:13; Exodus 31:17), reinstatement of Sabbath observance does not necessarily involve reinstatement of the whole Mosaic Covenant.