The word "fury" means violent anger, and here it is a metonym for punishment. "I will stop punishing them because I will have punished them fully." (See: [[rc://en/ta/man/jit/figs-metonymy]])
You may need to make explicit why Yahweh will be appeased. Alternate translation: "I will be comforted in knowing that I have punished them enough" (See: [[rc://en/ta/man/jit/figs-explicit]])