(Ezra 6:9) "Whatever is needed--young bulls, rams, male lambs for burnt offerings to the God of heaven, and wheat, salt, wine and oil, as requested by the priests in Jerusalem--must be given them daily without fail" [which shows he was a good king to the Jews]! Rabbi Yitzchak said to him: Rabbi, from your very source [I will prove you are wrong]. (Ezra 6:10) "...so that they may offer sacrifices pleasing to the God of heaven and pray for the well-being of the king and his sons."
But can this be? Isn't it written, (Daniel 5:23) "But have lifted up yourself against the Lord of heaven; and they have brought the vessels of his house before you, and you, and your lords, your 'shegels', and your wives, have drunk wine from them..." And if 'shegel' means the dog, does a dog drink wine? This is not a difficulty, for they trained it and it drank.
Hence it was that Daniel said to him “But you have lifted yourself up against the Lord of heaven, and they have brought the vessels of his house before you” (Daniel 5:23). It is further written, “In that night Belshazar the Chaldean king was slain” (Daniel 5:30), and it is written, “And Darius the Mede received the kingdom, being about thirty two years old” (Daniel 6:1).