These two phrases mean the same thing and emphasize the command to listen to what Yahweh says. In the second phrase Yahweh's "mouth" is a metonym for himself. Alternate translation: "listen to what Yahweh says. Pay attention to his words" (See: [[rc://en/ta/man/jit/figs-parallelism]] and [[rc://en/ta/man/jit/figs-metonymy]])