Yechezk’el 42:1-14 Then he brought me out into the outer court, the way toward the north; and he brought me to the chamber which was opposite the separate area and opposite the building toward the north. Along the length, which was a hundred cubits, was the north door; the width was fifty cubits. Opposite the twenty cubits which belonged to the inner court, and opposite the pavement which belonged to the outer court, was gallery corresponding to gallery in three stories. And before the chambers was an inner walk ten cubits wide, a way of one hundred cubits; and their openings were on the north. Now the upper chambers were smaller because the galleries took more space away from them than from the lower and middle ones in the building. For they were in three stories and had no pillars like the pillars of the courts; therefore the upper chambers were set back from the ground upward, more than the lower and middle ones. As for the outer wall by the side of the chambers, toward the outer court facing the chambers, its length was fifty cubits. For the length of the chambers which were in the outer court was fifty cubits; and behold, the length of those facing the temple was a hundred cubits. And below these chambers was the entrance on the east side, as one enters them from the outer court. In the thickness of the wall of the court toward the east, facing the separate area and facing the building, there were chambers. And the way in front of them was like the appearance of the chambers which were on the north, according to their length so was their width; and all their exits were both according to their arrangements and openings. And corresponding to the openings of the chambers which were toward the south was an opening at the head of the way, the way in front of the wall toward the east, as one enters them. Then he said to me, "The north chambers and the south chambers, which are opposite the separate area, they are the holy chambers where the priests who are near to the L-RD shall eat the most holy things. There they shall lay the most holy things, the grain offering, the sin offering, and the guilt offering; for the place is holy. "When the priests enter, then they shall not go out into the outer court from the sanctuary without laying there their garments in which they minister, for they are holy. They shall put on other garments; then they shall approach that which is for the people."
The corresponding letter to this chapter is Resh –wickedness
The outer court is mentioned and was for the people. This court was not holy like the court for the priests who were set apart and could not even enter the inner court without first taking off their garments and changing into “holy garments” before entering. Sin will be diminishing at this time but still will be present during the millennial reign. It will remain until the last rebellion when the serpent of old, HaSatan, will be let lose for he last time before he and his followers will be thrown in the lake of fire forever.
Revelation 20:7-10 And when the thousand years are completed, Satan will be released from his prison, and will come out to deceive the nations which are in the four corners of the earth, Gog and Magog, to gather them together for the war; the number of them is like the sand of the seashore. And they came up on the broad plain of the earth and surrounded the camp of the saints and the beloved city, and fire came down from heaven and devoured them. And the devil who deceived them was thrown into the lake of fire and brimstone, where the beast and the false prophet are also; and they will be tormented day and night forever and ever.
Yechezk’el 42:15-20 Now when he had finished measuring the inner house, he brought me out by the way of the gate which faced toward the east, and measured it all around. He measured on the east side with the measuring reed five hundred reeds, by the measuring reed. He measured on the north side five hundred reeds by the measuring reed. On the south side he measured five hundred reeds with the measuring reed. He turned to the west side, and measured five hundred reeds with the measuring reed. He measured it on the four sides; it had a wall all around, the length five hundred and the width five hundred, to divide between the holy and the profane.
The prophet Yesha’yahu (Isaiah) also mentioned the Millennial Temple.
Yesha’yahu (Isaiah) 2:2-4 Now it will come about that In the last days, The mountain of the house of the L-RD Will be established as the chief of the mountains, And will be raised above the hills; And all the nations will stream to it. And many peoples will come and say, "Come, let us go up to the mountain of the L-RD, To the house of the G-d of Ya’akov (Jacob); That He may teach us concerning His ways, And that we may walk in His paths." For the law will go forth from Zion, and the word of the L-RD from Yerushalayim (Jerusalem). And He will judge between the nations, and will render decisions for many peoples; and they will hammer their swords into plowshares, and their spears into pruning hooks. Nation will not lift up sword against nation, and never again will they learn war.