John Gills Exposition of the Bible Commentary - Daniel 5:30
In that night was Belshazzar, the king of the Chaldeans, slain. Not by a servant of his own, as Jacchiades; or by an eunuch, one of his guards, as Saadiah and Joseph ben Gorion F2 Hist. Heb. l. 1. c. 6. p. 26. ; but by Gadales and Gobryas, who led Cyrus's army up the river Euphrates into the city of Babylon, its course being turned; the inhabitants of which being revelling and rioting, and the gates open, these men went up to the king's palace; the doors of which being opened by the... read more
Matthew Henry's Complete Commentary - Daniel 5:30-31
Here is, 1. The death of the king. Reason enough he had to tremble, for he was just falling into the hands of the king of terrors, Dan. 5:30. In that night, when his heart was merry with wine, the besiegers broke into the city, aimed at the palace; there they found the king, and gave him his death's wound. He could not find any place so secret as to conceal him, or so strong as to protect him. Heathen writers speak of Cyrus's taking Babylon by surprise, with the assistance of two deserters... read more