Albert Barnes Commentary Ezekiel 42:15-19

"Now when he had made an end of measuring the inner house, he brought me forth by the way of the gate whose prospect is toward the east, and measured it round about. He measured on the east side with the measuring reed five hundred reeds, with the measuring reed round about. He measured on the north side five hundred reeds with the measuring reed round about. He measured on the south side five hundred reeds with the measuring reed. He turned about to the west side, and measured five hundred reeds with the measuring reed." — Ezekiel 42:15-19 (ASV)

The Precincts. The temple and its courts were surrounded by an area of exact dimensions 3,000 cubits (1,500 yards) square (Ezekiel 42:15). See Plan IV.

The inner house – The temple and its courts, all that lay within the wall on the outside of the house (Ezekiel 40:5); the gate is the eastern gate of the outer court.

Measured it round about – The precincts, into which he had brought the seer through the eastern gate of the outer court.