Ezekiel 41:4

So he measured the length thereof, twenty cubits; and the breadth, twenty cubits, before the temple: and he said unto me, This [is] the most holy [place].

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 holies, 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. Pompey and Heliodorus, for presuming to press into it, were heavily plagued.