The author uses this rhetorical question to teach that both calamities and good things happen only because God has commanded them to happen. Alternate translation: "It is only from the mouth of the Most High that both calamities and the good come." or "It is only because the Most High has commanded it that both calamities and good things happen." (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-rquestion]])
Here "mouth" represents what God says or commands. Alternate translation: "from the command of the Most High" or "because the Most High has commanded it" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "come" represents happening. Also, the nominal adjective "the good" can be stated as "good things." Alternate translation: "both calamities and good things happen" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-nominaladj]])