Zechariah 5:1

"They sank in the depth like a stone." Why "did they sink in the depth like a stone"? Because they were not the kind of "stones which sons of Abraham could be raised up" but the kind which love the depth and desire the liquid element, that is, who seize the bitter and fluid desire of present things. Whence it is said of these: "They sank like lead in very deep water." They are serious sinners. For iniquity is also shown "to sit upon a talent of lead," as Zechariah the prophet says: "I saw a woman sitting upon a talent of lead, and I said, 'Who is this?' And he answered, 'Iniquity.' " Hence it is, therefore, that the unjust "sank in the depth, like lead in very deep water."

As to the suggestion you made in your letter that we should examine together the nature of an oath extorted by force, I beg of you, do not let our discussion turn crystal-clear matters into murky ones. If a servant of God were threatened with certain death, so that he should swear to do something forbidden and wicked, he still ought rather to die than to swear, so as not to commit a crime in fulfilling his oath. But in this case, … it was only the persistent shouting of the people that was forcing the man not to any crime but to what could be lawfully done, if it were done. And … the only thing to fear was that a few violent men, mingled with a crowd of mostly good ones, might seize the occasion to start a riot, under pretence of virtuous indignation, and might break out into some accursed disturbance to satisfy their passion for robbery. And when even this fear was unfounded, who would think that perjury could be committed even to avoid certain death, much less loss or some kind of physical injury? That individual called Regulus had never heard what the holy Scriptures say about the wrongfulness of a false oath. He had learned nothing about the sickle of Zechariah, and obviously he had not sworn to the Carthaginians by the sacraments of Christ but by the filthiness of demons. Yet he did not so fear certain torture and a horrible sort of death as to take his oath under compulsion, but he went to meet them to avoid perjuring himself, because he had sworn on oath of his own free will.

(Chapter 5, verses 1 onwards) Then I turned and lifted up my eyes, and behold, a flying scroll! And he said to me, "What do you see?" I answered, "I see a flying scroll; its length is twenty cubits, and its width ten cubits." Then he said to me, "This is the curse that is going out over the face of the whole land. For everyone who steals shall be cleaned out according to what is on one side, and everyone who swears falsely shall be cleaned out according to what is on the other side. I will raise up, says the Lord of hosts, and it will come to the house of the thief and to the house of the one who swears falsely in my name, and it will remain in the midst of his house and consume it and its wood and its stones. LXX: And I turned and lifted up my eyes and saw a flying sickle. And he said to me, What do you see? And I said, I see a flying sickle, twenty cubits long and ten cubits wide. And he said to me: This is the curse that goes out over the face of all the land: because every thief will be punished from this until death, and every perjurer will be crucified from this until death. And I will bring it, says the Lord Almighty, and it will go into the house of the thief, and the house of the one who swears falsely in my name, and it will rest in the midst of his house, and it will consume him, and his wood, and his stones. Turning, the prophet said, to another vision, and lifting my eyes from joyful and fortunate things to sadder things, I see a flying scroll that is called Megella in Hebrew, and it is translated as διφθέρα by Aquila and Theodotion, and as κεφαλὶς by Symmachus, meaning, chapter, according to what we read in the psalm: In the chapter of the book it is written about me (Ps. XIX, 8); or according to the Seventy, δρέπανον πετόμενον, meaning, a flying sickle. For all the things that he had seen above, the construction of the temple, the coming of the Lord Savior, the liberation of the people from Babylon, had been proclaimed. Therefore, so that his heart would not be lifted up with the Apostle (to whom the angel of Satan had been given to buffet him), he also sees the things that are sad, so that whatever had increased in arrogance from the revelation of good things, may decrease from the threat of sad things. Moreover, a flying scroll is shown, in which all sins are written down, so that each person may receive according to their works, whether…