The side rooms were arranged one above another in three levels of thirty rooms each. There were ledges all around the wall of the temple to serve as supports for the side rooms, so that the supports would not be fastened into the wall of the temple itself.
Berean Standard Bible (BSB)
The side rooms were in three stories, one over another, and thirty in order; and they entered into the wall which belonged to the house for the side rooms all around, that they might have hold therein, and not have hold in the wall of the house.
World English Bible (WEB)
And the side{H6763} chambers{H6763} were three{H7969}, one over another{H6763}, and thirty{H7970} in order{H6471}; and they entered{H935}{(H8802)} into the wall{H7023} which was of the house{H1004} for the side chambers{H6763} round about{H5439}, that they might have hold{H270}{(H8803)}, but they had not hold{H270}{(H8803)} in the wall{H7023} of the house{H1004}.
Strong's King James
The F.O.G
The F.O.G Message
And the side-chambers are side-chamber by side-chamber, three and thirty times; and they are entering into the wall—which the house hath for the side-chambers all round about—to be taken hold of, and they are not taken hold of by the wall of the house.
Young's Literal Translation
