The king uses this question to say that he does not want God's wrath to come upon them. The implied information is that if they do not do give Ezra what he needs, then God will punish the kingdom. Alternate translation: "For we do not want God's wrath to come upon the kingdom of me and my sons." or "For if you do not do these things, God's wrath will come upon the kingdom of me and my sons." (See: [[rc://en/ta/man/jit/figs-rquestion]])
God's wrath represents God punishing them. Alternate translation: "For why should God punish the kingdom of me and my sons" or "For if you do not do these things, God will punish the kingdom of me and my sons" (See: [[rc://en/ta/man/jit/figs-metonymy]])