Ezekiel 40:27

And lest we think there is only one atrium to the south, it is said about the second atrium: And the entrance of the inner atrium is on the southern road: and it is measured from the entrance to the entrance on the southern road one hundred cubits; so that after a week and the sacraments of the old covenant, she may reach the good land and the grace of the Gospel.

(Verse 24 and following) 'And he led me to the south gate, and behold, there was a gate that faced south. And its frontispiece and vestibule were measured according to the upper measurements, and its windows and vestibules all around were like the other windows. It had a length of fifty cubits, and a width of twenty-five cubits, and it was ascended by seven steps, and there was a vestibule in front of its doors, and palm trees were carved on it, one on one side, and the other on the other side in front of it.'

Now it is said: "And the gate of the inner court toward the South way, and he measured from gate to gate in the South way, one hundred cubits." Now, therefore, we must inquire what these three inner gates are. For the gate of the inner court which was mentioned above is not among these three inner gates, because that one is said to face toward the gate of the East and North, whereas these are recorded as being positioned individually within toward the South or East and North. Hence through that one the inner entrance is rightly designated, because, as was already said in the preceding discussion, it lies open either to Jews and Gentiles, or to those beginning and those persevering in good, or to those falling from good but rising after their faults through repentance. But now, after individual gates have been described in the East and North and South, why are individual gates of the inner court again described in the South and East and North? With the Lord breathing inspiration, great effort is needed to search out the depth of so great a mystery. For if by the name of gates we understand the holy preachers, we should know that the Church is one in the preachers of the Old and New Testament. The gates have seven or eight steps because they harmoniously preach the sevenfold grace of the Holy Spirit, and by the eighth step they announce the reward of eternal retribution. Whence it is written: "Give a portion to seven, and also to eight." What, therefore, can we say the outer gates were, except the ancient fathers, who through the precepts of the law knew how to guard the works of the people rather than their hearts? So that we ought to understand the inner gates as the preachers of holy Church, who by spiritual counsels guard the hearts of their disciples, lest they take delight even in thoughts in the evil things they do not do. […]

And there was a gate in the inner court toward the south,.... Which answered to the gate of the outward court before mentioned: and he measured from gate to gate toward the south an hundred cubits; from the gate of the inward court, to the gate of the outward court southward, were just the same dimensions as in the east and north gates, and between their respective ones, Eze 40:19.