John Trapp on Ezekiel 41:4

Ver. 4. And the breadth thereof twenty cubits] So it was a juſt ſquare, intimating the ſtability of the Kingdom of Heaven, a Kingdom that cannot be ſhaken, Heb. 12.28.

This is the moſt holy place] The Holy of Holyes, the Oracle, the houſe of the ſoul wherein the only firm hope of Iſrael reſteth (ſo the Jews called it) the Adytum or inacceſſible place, whither none might come but the High Prieſt only, and that but once a year. Pompy and Heliodorus, for preſuming to preſſe into it, were heavily plagued.