1 So the king and Haman came to banquet with Esther the queen. 2 And the king said again unto Esther on the second day at the banquet of wine, What is thy petition, queen Esther? and it shall be granted thee: and what is thy request? and it shall be performed, even to the half of the kingdom. 3 Then Esther the queen answered and said, If I have found favour in thy sight, O king, and if it please the king, let my life be given me at my petition, and my people at my request: 4 For we are sold, I and my people, to be destroyed, to be slain, and to perish. But if we had been sold for bondmen and bondwomen, I had held my tongue, although the enemy could not countervail the king's damage. 5 Then the king Ahasuerus answered and said unto Esther the queen, Who is he, and where is he, that durst presume in his heart to do so? 6 And Esther said, The adversary and enemy is this wicked Haman. Then Haman was afraid before the king and the queen. 7 And the king arising from the banquet of wine in his wrath went into the palace garden: and Haman stood up to make request for his life to Esther the queen; for he saw that there was evil determined against him by the king. 8 Then the king returned out of the palace garden into the place of the banquet of wine; and Haman was fallen upon the bed whereon Esther was. Then said the king, Will he force the queen also before me in the house? As the word went out of the king's mouth, they covered Haman's face. 9 And Harbonah, one of the chamberlains, said before the king, Behold also, the gallows fifty cubits high, which Haman had made for Mordecai, who had spoken good for the king, standeth in the house of Haman. Then the king said, Hang him thereon. 10 So they hanged Haman on the gallows that he had prepared for Mordecai. Then was the king's wrath pacified.
[AD 856] Rabanus Maurus on Esther 6:14-7:7
The second day of the banquet arrives to which Haman is invited like before. However, after Esther reveals her petition, he is condemned and brought to his place of execution. The gospel mentions this as a noonday meal in one passage and as an evening meal in another. For it designates the noonday meal of the present church but also the eternal supper and final banquet where only the righteous will rejoice before their creator after sinners have been separated out. Therefore Haman, the spiritual enemy of the people of God, realized that the king was angry because he did not have the robe of charity that would make him worthy of the royal banquet. And while he was hurrying to the palace gardens, that is, while he invited his elect to the delights of paradise, he tried to entreat the queen for his salvation. It was to no avail, however, because he was not able to find the right time for this. It is already too late to ask for the remedies of salvation when revenge and punishment are near.In the parable of the gospel concerning the coming bridegroom, the foolish virgins also ask the wise for oil to fill their lamps, but do not receive any. And after the bridegroom has entered the wedding banquet with the wise virgins, the door is closed. And because they are left outside, they ask to be admitted. They are no longer able to incur this favor, however, because the time for mercy which they neglected to ask for previously with their good works is now past.
One who has no desire to hear what the Lord has commanded cannot receive from him what he asks for. And one who has neglected the time for appropriate repentance comes in vain to the door of the kingdom with his prayers. And indeed the Lord says through Solomon, “I called you and you refused. I stretched out my arms and no one heeded. And because you ignored all my counsel and would have none of my reproof, I also will laugh at your calamity; I will mock when panic strikes you like a storm, and your calamity comes like a whirlwind, when distress and anguish come upon you. Then they will call upon me, but I will not answer; they will seek me diligently, but will not find me.”

[AD 856] Rabanus Maurus on Esther 6:14-7:6
Now, notice that Haman is now attending the second day just as he had come before when he was summoned; and yet once Esther lays out her request, he is condemned and goes off to his punishment. This explains the fact that in one place in the Gospels is mentioned a lunch made by a person, and elsewhere a dinner; since the lunch symbolizes the present Church, and the dinner the eternal and final feast. Hence once the sinners have been removed, only the good may rejoice in the sight of their creator.

Because Haman—who was of course the spiritual enemy of the people of God—was not wearing the garment of charity which would have made him worthy of the king’s feast, he realized that the king was angry; and when the king rushed into the garden—that is, when he invited his chosen ones to the delights of paradise—he tried to plead with the queen for his own safety but in vain, since he could not find an opportune moment for this. For once the penalty of vengeance is imminent, it is too late to look for a means of salvation.

So too in the Gospel parable, the foolish virgins ask for oil to refill their lamps when the groom is on his way, but do not receive it. So after the Groom has entered the wedding with the wise virgins, and the door has been closed, the others remain locked out and must look for a point of entry; but there is no way they can be worthy of this, since they no longer find the opportunity for absolution which they had earlier failed to seek out by doing the appropriate deeds.

One may no longer deserve there what he asks from the Lord, if he did not listen here to what he was ordered to do; once he has lost the chance to do the appropriate penance, in vain does he come with his prayers before the door of the kingdom. This is, in fact, the reason why the Lord says through Solomon: “I called and you refused; I stretched out my hand and no one paid attention; you despised all my counsel, and you ignored my reproaches. I too will laugh at your destruction, and I will mock you when that which you fear comes to pass; when sudden disaster overwhelms you, and destruction assails you like a storm. Then they will call on me but I will not listen; they will arise in the morning but will not find me” (Proverbs 1).

[AD 856] Rabanus Maurus on Esther 7:8
That is, Haman’s attempt to beseech Queen Esther was regarded by King Ahasuerus as a ruse, because when the day of judgment arrives the petitions of the wicked are seen not as prayer but as provocation. Hence it is written in the Psalm: “When he is judged let him leave condemned, and let his prayer become sin” (Psalms 109). For it is then that the oppression with which they were crushing the humble is thrown back in their faces, because the time of recompense is at hand; for then those who have been condemned for their sins are covered in shame, as it is written: “The confusion of their faces will cover them,” when they are dragged off to the depths of Hell to be given a reward that suits their actions.

[AD 856] Rabanus Maurus on Esther 7:8
Haman’s appeal to Queen Esther was considered by King Ahasuerus to be an act of deceit. Indeed, when the day of judgment is about to come, the petition of the wicked is no longer a prayer but a source of irritation. This is what is written in the psalm: “When he is tried, let him be found guilty; let his prayer be counted as sin.” Therefore the request is made for the oppression of those who previously oppressed the humble because the time of retribution has come. Then, after they are condemned, they are covered with the shame of their sins, as is written, “The confusion of their face will cover them,” when they are dragged to the darkness of hell to be rewarded with retribution suitable to their works.

[AD 856] Rabanus Maurus on Esther 7:9-10
It is written in Proverbs: “He who digs a pit will fall into it; and when one starts a stone rolling it will roll back upon him” (Proverbs 26). So too Haman was forced to suffer the cross he had prepared for Mordecai.

We might, however, ask what it means that, as we have read, the cross itself was made fifty cubits high. For the Law had previously been given to the people on the fiftieth day after a lamb was sacrificed on Mount Sinai; and given that we said before that Haman signified the Jews themselves when they were rioting against Christ—who had been promised to them in the Law—and persecuting his Church, the Law itself, which had been given to them to safeguard their lives, became the cause of their deaths because with it they had snuffed out the name of Christ and tried mightily to kill those who professed him. In other words, those who wanted by means of the Law to oppress the guiltless unjustly received through it the verdict of a just judgment, about which we are told by Paul: “Whoever has sinned in the Law will be judged through the Law” (Romans 2).

Moreover, Harbona the eunuch, who handed over the actual cross that had been made, signifies the teachers of the Law who brought to light—by reading the Law itself—the deceit of the Jews and everything which they did contrary to the precepts of God. Hence because Moses foresaw in the spirit the rebels and apostates who would one day come to be, he predicted in his song in Deuteronomy everything that was going to happen to sinners. So too the Savior says to the Jews themselves in the Gospel: “Do not think that I am going to indict you before the Father—it is Moses, in whom you hope, who accuses you; for if you believed in Moses you would perhaps believe in me as well, for it is about me that he wrote. But if you do not believe what he wrote, then how will you believe my words (John 5)?”

[AD 856] Rabanus Maurus on Esther 7:9-10
It is written in the book of Proverbs: “Whoever digs a pit will fall into it, and a stone will come back on the one who starts it rolling.” So also Haman was forced to support the cross that he had prepared for Mordecai.