This speaks of praise as if it were a person who could act on its own. Alternate translation: "To you alone, God in Zion, we will offer our praise" (See: [[rc://en/ta/man/translate/figs-personification]])
This can be stated in active form. Alternate translation: "we will do what we have promised you that we would do" (See: [[rc://en/ta/man/translate/figs-activepassive]])