Ezekiel 40:7

And every little chamber was one reed long, and one reed broad; and between the little chambers were five cubits; and the threshold of the gate by the porch of the gate within was one reed.

And every little chamber. These chambers were for the use of the Levites who watched at the temple-gates; guard-chambers, (, margin, 'keepers of the threshold;' ); also for depositing utensils and musical instruments in.