Zechariah 12:9

Nevertheless, when these things have thus been done, there shall appear the sign of the Son of man in heaven, and then the tribes of the earth shall mourn. For these things it is not absurd to use the examples of the prophet Zechariah, which run thus: "and it shall be in that day that I will seek to take away all the nations that come against Jerusalem, and I will pour out upon the house of David and upon the inhabitants in Jerusalem a spirit of grace and of compassion; and they shall look upon me because they danced, and they shall mourn over themselves a mourning as over a beloved one, and they shall grieve with grief as over a firstborn. And in that day the mourning shall be magnified in Jerusalem like the mourning of a pomegranate cut down in the field, and the earth shall mourn by tribes: the tribe of the house of David apart by itself and their women apart by themselves; the tribe of the house of Nathan apart by itself and their women apart by themselves; the tribe of the house of Levi apart by itself and their women apart by themselves; the tribe of the house of Shimei apart by itself and their women apart by themselves; and all the remaining tribes apart by themselves and their women apart by themselves". Therefore every earthly company, since it is a tribe of the earth — which rank they attributed to themselves — will mourn together with those like itself, especially if in some category of sinners it must mourn more abundantly. But I think that through these things there are shown the differences of those who seem to have been in the faith and in their own company, yet did not please God. There is, therefore, a house of David that mourns — those who, set up from among the people, did deeds worthy of mourning, or [those drawn] from among kings and magnates. But those from among the teachers who lived badly are the tribe of Nathan that mourns, since Nathan was a prophet; and to teach is to prophesy. So those who are sinners from among those who were set over the Church and had the priesthood enjoined upon them and did not administer their office well, are the tribe of the house of Levi that mourns. And to speak the truth, whether concerning those tribes which we have mentioned or concerning the tribe of Shimei, belongs to God alone. But we, for the present, think that all who were catechized and instructed in the divine mystery, and were not ordained…

(Verse 9) And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem. And I will pour out upon the house of David and upon the inhabitants of Jerusalem the spirit of grace and of supplications. LXX: And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem, and I will pour out upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of mercy. In that day, when the Lord protects the inhabitants of Jerusalem, the Lord will seek to destroy all the nations that come against Jerusalem. But He will crush not for destruction, but for correction, so that they may cease to wage war against Jerusalem and begin to be of Jerusalem. For if He created all things out of nothing, He did not create them in order to destroy what He created; but so that through His mercy, those things which were created may be saved. Hence, in the book of Wisdom, which is attributed to Solomon (if anyone, however, is pleased to receive the book), we find it written: He created all things that they might exist, and the generations of the world might be preserved; and there will be no deadly poison for them (Wisdom 1). For just as the Lord came to seek what was lost and saved the human race, so he also destroyed the nations, because the nations were adversaries. Therefore it follows: I will pour out upon the house of David and upon the inhabitants of Jerusalem the spirit of grace and mercy. Concerning this grace, Paul also writes: The love of God has been poured out into our hearts (or yours) through the Holy Spirit, who has been given to us (Rom. V, 5). And in the aforementioned volume it is contained: Who shall explore the things that are in heaven, unless you have given wisdom, and sent your Holy Spirit from on high? And thus the paths of those who are on earth have been corrected, and men have been taught what pleases you (Wisdom 9:16). And in Isaiah God speaks: I have given my Spirit upon you (Isaiah 42:1). And again, the same Scripture mentions: I have given my Spirit upon him (ibid). However, the word effusion implies a sense of abundance or generosity, as is evident in what we have said: 'The love of God has been poured out into our hearts' (Romans 5:5). And in another place, speaking as if in the person of God, it is said: 'I will pour out my Spirit on…