Ezekiel 40:17,18

“Then he brought me to the outer court, and lo there were chambers, fronted by a pavement, erected round about the court. Thirty chambers were fronted by the pavement. And the pavement was beside the gates, corresponding to the length of the gates, even the lower pavement.”

Chambers were built around the outer court. The purpose of the chambers, which were built on the wall, with the pavement in front, is not mentioned, but see Jeremiah 35:2. They were probably used as meeting places, and for the general convenience of worshippers. ‘Thirty' (three intensified) demonstrates a completeness of provision for worshippers. All that was needed was here. They were built on a ‘lower pavement' There was a ‘higher pavement' in the inner court. An increase in height at each stage demonstrated the increasing holiness of the place in question.