Yochanan is giving a measuring stick and told to measure the Millennial Temple and the Altar. Specific measurements for the Temple are revealed by the prophet Ezekiel. He measures the thickness of the walls, the gates, the gate entrances, the guard rooms, the courtyard, and the sanctuary, and the Most Holy Place (Ezekiel 42). He is also given the dimensions of the Altar:
"Your eyes will see Jerusalem: A tent which will not be folded; its stakes will never be pulled up" (Isaiah 33:20).
