The words "hand" and "arm" both represent power. Alternate translation: "with very great power" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-doublet]])
Yahweh speaks of expressing his fury as if the fury were a liquid that he pours on on the people. This can be stated in active form. Alternate translation: "fury that I will pour out on you" or "I will express my fury towards you" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-activepassive]])