Hippolytus of Rome : In the same night king Belshazzar the Chaldean was killed and Darius the Mede received the kingdom being sixty-two years old. [Daniel 5:29-31] After the interpretation had been solved by Daniel, just as Scripture encompasses all things, in the same night the phrase was fulfilled and the kingdom of the Babylonians passed to the Medes, just as was spoken by Daniel, "He appoints kings and removes them knowing what is in darkness and light is with him" [Daniel 2:21, 22] — Commentary on Daniel 3.18.2-3 Jerome : Verses 30, 31. "On that same night Belshazzar, King of the Chaldeans, was slain, and Darius the Mede succeeded to his kingdom at the age of sixty-two." Josephus writes in his tenth book of the Jewish Antiquities that when Babylon had been laid under siege by the Medes and Persians, that is, by Darius and Cyrus, Belshazzar, King of Babylon, fell into such forgetfulness of his own situation as to put on his celebrated banquet and drink from the vessels of the Temple, and even while he was besieged he found leisure for banqueting. From this circumstance the historical account could arise, that he was captured and slaughtered on the same night, while everyone was either terrified by fear of the vision and its interpretation, or else taken up with festivity and drunken banqueting. As for the fact that while Cyrus, King of the Persians, was the victor, and Darius was only King of the Medes, it was Darius who was recorded to have succeeded to the throne of Babylon, this was an arrangement occasioned by factors of age, family relationship, and the territory ruled over. By this I mean that Darius was sixty-two years old, and that, according to what we read, the kingdom of the Medes was more sizable than that of the Persians, and being Cyrus's uncle, he naturally had a prior claim, and ought to have been accounted as successor to the rule of Babylon. Therefore also in a vision of Isaiah which was recited against Babylon, after many other matters too lengthy to mention, an account is given of these things which are to take place: "Behold I Myself will rouse up against them the Medes, a people who do not seek after silver nor desire gold, but who slay the very children with their arrows and have no compassion upon women who suckle their young" (Isaiah 13:17-18). And Jeremiah says: "Sanctify nations against her, even the kings of Media, and the governors thereof and all the magistrates thereof and all the land under the power thereof" (Jeremiah 51:28). Then follow the words: "The daughter of Babylon is like a threshing-floor during the time of its treading; yet a little while, and the time of its harvesting will come" (Jeremiah 51:33). And in testimony of the fact that Babylon was captured during a banquet, Isaiah clearly exhorts her to battle when he writes: "Babylon, my beloved, has become a strange spectacle unto me: set thou the table and behold in the mirrors those who eat and drink; rise up, ye princes, and snatch up your shields!" (Isaiah 21:4-5). — St. Jerome, Commentary on Daniel, CHAPTER FIVE Theodoret of Cyrus : Now, it is necessary to inquire why on earth the God of all corrected Nebuchadnezzar and in turn restored him to his kingdom but forthwith deprived this man of both kingdom and life. On consideration, then, we find, first, that Nebuchadnezzar had not observed another person paying the penalty for impiety, and hence God's just sentence granted him pardon, whereas this other man, though observing his father's heavy penalty, gained nothing from it. The just judge was therefore within his rights in confining punishment of the former to a specified time, whereas he granted the latter no pardon. In particular, God foresees all future events and thus knows them clearly as if already in the past; so he knew ahead of time the repentance of the former and arranged for his fate accordingly, whereas he knew ahead of time the latter's incorrigible impiety and put a stop to the increase in impiety with death. — COMMENTARY ON Daniel 5:28