"to God's throne, where there is grace." Here "throne" refers to God ruling as king. Alternate translation: "to where our gracious God is sitting on his throne" (See: [[rc://en/ta/man/jit/figs-metonymy]])
Here "mercy" and "grace" are spoken of as if they were objects that can be given or can be found. Alternate translation: "God may be merciful and gracious and help us in time of need" (See: [[rc://en/ta/man/jit/figs-metaphor]])