The idiom "exalted on high" means that Yahweh had given great honor to David's kingdom. This can be stated in active form. Alternate translation: "Yahweh had exalted David's kingdom on high" or "Yahweh had given great honor to David's kingdom" (See: [[rc://en/ta/man/translate/figs-idiom]] and [[rc://en/ta/man/translate/figs-activepassive]])