Ezekiel 40:10

And the little chambers of the gate eastward were three on this side, and three on that side; they three were of one measure: and the posts had one measure on this side and on that side.

Cross-reference

Ezekiel 40:7 also describes the guardrooms of the gate — this verse gives the number of chambers, complementing those measurements.

Ezekiel 40:21 repeats the same three-chamber-per-side pattern for the north gate, confirming the symmetric design.

Ezekiel 40:29 also describes three chambers on each side for the south gate, mirroring the east gate's layout.

Ezekiel 40:5 defines the measuring reed — the 'one measure' here refers to that standard cubit used throughout the vision.