Ezekiel 40:21

(Verse 20, 21.) He also measured the gate of the outer court that faced north, both in length and width. It had three rooms on each side, and its front and vestibule were the same size as those of the gate that faced east. The gate was fifty cubits long and twenty-five cubits wide, and its windows, vestibule, and carvings were all the same size as those of the gate that faced east. There were seven steps in its ascent, and a vestibule before it.

And it had, it says, fifty cubits in length and twenty-five in width, so that eternal rest might be demonstrated after fifty weeks following seven weeks: extending during the day of resurrection to the kingdoms of heaven, in which true rest is found.

And because in the knowledge of the Holy Trinity hearers advance from the word of preaching in love of the same Trinity, this same gate has three chambers on one side and three on the other, because everything that the Creator speaks concerning the Trinity through the New Testament, He also shows from the Old Testament. And the heart of hearers advances in love of the heavenly fatherland, so that the soul clinging to God may sit as a bride with the bridegroom in a certain chamber already, and turn itself completely away from earthly desires. Or certainly, as was said far above, because there are three orders of those living well, namely of the good married, the continent, and the preachers, and because some even placed in marriages long for the heavenly fatherland with love, while others through hope of eternal joy even mortify the flesh, and flee all earthly activities, and scorn to be entangled in the care of this world, while others both despise earthly goods and preach the heavenly joys which they have come to know, what are these if not chambers in the spiritual building, in whose thought and meditation the soul is joined to the heavenly spouse? Because the Church from the Gentiles not only has these three orders of the good, but also the Synagogue once had them, while a great multitude of spiritual persons ardently awaited the grace of the Redeemer, the gate of the heavenly building has three chambers on this side and three on that side, because every preacher, when he summons his hearer to the heavenly fatherland, demonstrates that both new and old fathers longed with heavenly desire. […]

And the little chambers thereof were three on this side, and three on that side,.... As in the eastern gate, and the measures the same, Eze 40:

But the description is repeated very particularly. And thus largely was the structure of the tabernacle related in Exodus, and of the temple in the books of Kings and Chronicles, to signify the special notice God does take, and his ministers should take, of all that belong to his church. His delight is in them; his eye is upon them.