Revelation 6:11

But if anyone with precipitate haste rashly thinks that he can grant remission of sins to all or dares to rescind the precepts of the Lord, not only is this of no advantage to the lapsed but it is even a hindrance. Not to have observed the judgment of the Lord, and to think that his mercy is not first to be implored, but after condemning the Lord to presume on one’s own power, is to have provoked his wrath. Under the altar of God the souls of the slain martyrs cry out with a loud voice, saying, “How long, O Lord holy and true, do you refrain from judging and from avenging our blood on those who dwell on earth?” And they are ordered to be quiet and to continue to have patience. Does someone think that anyone can wish to become good by remitting and pardoning sins at random or that he can defend others before he himself is vindicated? The martyrs order something to be done. If just, if lawful, if not contrary to the Lord himself, they are to be done by the priest of God. Let the agreement be ready and easy on the part of the one obeying, if there has been religious moderation on the part of him asking. The martyrs order something to be done. If what they order is not written in the law of the Lord, we must first know, that they have obtained from the Lord what they ask, then do what they order. For what has been assured by man’s promise cannot be seen at once to have been granted by the divine majesty.

"And when He had opened the fifth seal, I saw under the altar the souls of them that were slain." He relates that he saw under the altar of God, that is, under the earth, the souls of them that were slain. For both heaven and earth are called God's altar, as saith the law, commanding in the symbolical form of the truth two altars to be made,-a golden one within, and a brazen one without. But we perceive that the golden altar is thus called heaven, by the testimony that our Lord bears to it; for He says, "When thou bringest thy gift to the altar" (assuredly our gifts are the prayers which we offer), "and there rememberest that thy brother hath ought against thee, leave there thy gift before the altar." Assuredly prayers ascend to heaven. Therefore heaven is understood to be the golden altar which was within; for the priests also were accustomed to enter once in the year-as they who had the anointing-to the golden altar, the Holy Spirit signifying that Christ should do this once for all. As the golden altar is acknowledged to be heaven, so also by the brazen altar is understood the earth, under which is the Hades,-a region withdrawn from punishments and fires, and a place of repose for the saints, wherein indeed the righteous are seen and heard by the wicked, but they cannot be carried across to them. He who sees all things would have us to know that these saints, therefore-that is, the souls of the slain-are asking for vengeance for their blood, that is, of their body, from those that dwell upon the earth; but because in the last time, moreover, the reward of the saints will be perpetual, and the condemnation of the wicked shall come, it was told them to wait. And for a solace to their body, there were given unto each of them white robes. They received, says he, white robes, that is, the gift of the Holy Spirit.

The Word of God shows that when the time of vengeance comes, conversion will not then help the evil person evade punishment but avenging wrath will destroy him with due damnation. For that will be a time not of remission but of retribution, not of forgiveness but of revenge. This is put off by the divine patience so that the number of the saints can be filled up. The blessed John in the Apocalypse recalls that it is the saints who asked for this vengeance in these words, “How long will it be, holy and true master, before you sit in judgment and avenge our blood on the inhabitants of the earth?” And to teach those who are joined to this company that the time for vengeance is being put off by the highest ordinance, he adds right away. “Each of them was given a white robe, and they were told to be patient a little while longer until the number was filled of their fellow servants and brothers.”

Having said these things, they first put on white robes. This was a symbol of being purified by their own blood and of laying aside all impurity.

Then they hear: "rest a little longer, until their fellow servants and their brothers, who were to be killed as they were, should be completed." For it was not just that those who were equal in courage should be hindered from receiving the crowns of martyrdom, which had been taken away prematurely from those whom demons tormented.

We believe that this was revealed to them by the knowledge of divine wisdom, that since the impious will inevitably be punished with eternal punishment and since the fountain of heavenly grace will flow forth unto the end of the world, many will until then be taken into the company of the holy martyrs. And when they received this response, they were filled with an inexpressible joy, which we believe is aptly symbolized by the white robes. Therefore, each one received a white robe, so that through the perfection of love that is poured out into the hearts of believers through the Holy Spirit, they might be content with this consolation and prefer rather to wait for the completion of the number of other brothers.

In this passage the saints are shown praying for the consummation of the world. Therefore, they are told to have patience until the completion of the brothers, so that “apart from them they would not be made perfect,” as the apostle says. The white robes reveal the brightness that appears on them because of their virtues, in which they are clothed, although they “had not yet received the promises.” And so, putting away every dullness, in the hope for these things, which they see in the spirit, they rightly rejoice, resting in the bosom of Abraham. For to many of the saints it is said that each receives a place worthy of the doer of virtue through which they are judged of their future glory.

And it was told to them that they should rest for a little while longer, etc. The desire for resurrection is not denied, but it is deferred due to the increase of the brethren yet to be gathered. For even the joy of the souls can be symbolized by the white robes, when, with the Lord revealing to them, they learn both that the wicked are to be damned at the end and that many will be joined to their number through martyrdom until the end of the world. Filled with internal charity, they prefer their joy to be deferred until the number of their brethren is completed.

The spirits of the elect who dwell in that heavenly city can be understood as asking in the name of the Savior on their own behalf too, since they clearly desire the coming of the period of universal judgment and the resurrection of their bodies, in which they have striven for the Lord’s sake... Each soul now has a white robe, when each enjoys his bliss alone. They will then receive two, when the number of their brothers has been filled at the end, and they are gladdened by receiving their own immortal bodies.

And each of them was given a white robe. Now, the souls of the saints have individual robes, rejoicing in their blessed immortality. But when their bodies rise again, according to Isaiah, they will possess double in their land.

And white robes were given to every one of them one; and it was said to them, that they should rest yet for a little time, till the number of their fellow servants, and of their brethren, who are to be slain, even as they, should be filled up. What is meant by the white robes but the reward of martyrs? Indeed, before the resurrection, the elect are said to have received one robe each because so far they enjoy eternal happiness only in the soul. Note also that the words of the souls are what lovers desire; then it is the role of God to reply that they should wait for their brethren to be gathered together, and it is theirs to willingly instill the patience to wait into their minds. So they are wishing for the resurrection of bodies, but they hear that they should wait willingly for their brethren to be gathered together.