Ezekiel 40:46-48

Amplified Bible

⁴⁶ but the chamber which faces toward the north is for the priests who have the responsibility and take care of the altar. These are the sons of Zadok, who [alone] from the sons of Levi come near to the Lord to minister to Him.” ⁴⁷ He measured the courtyard, a hundred cubits long and a hundred cubits wide, a perfect square; and the altar was in front of the temple.

⁴⁸ Then he brought me to the porch of the temple, and he measured each side pillar of the porch, five cubits on each side; and the width of the gate was three cubits on each side.