This can be translated as a statement. Alternate translation: "Tell me who shut up the sea with doors ... and thick darkness its swaddling bands." (See: [[rc://en/ta/man/translate/figs-rquestion]])
The abstract noun "darkness" can be translated as the adjective "dark." Alternate translation: "made dark clouds its swaddling bands" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])