Three, one over another, and thirty in order - i. e., there were three stories, and each story was divided into thirty chambers.
The wall which was of the house for the side chambers - Not the wall of the temple but another wall Ezekiel 41:9 parallel to it, which might be said to be “of the house,” i. e., belonging to it. The side-chambers of Solomon’s Temple were built against the temple-wall, but in Ezekiel’s vision the desire to keep the temple still more separate and holy led to a fresh arrangement, namely, that another wall should be built at such a distance from the temple-wall as to allow of chambers being built against it, facing the temple-wall, and opening into a passage or corridor (F), separating them from the temple itself.
That they might have hold, but they had not hold in the wall of the house - that they might have hold but not have hold on the wall of the house, i. e., entirely separating the chambers from the temple-wall proper.