Here "[Benjamin](rc://en/tw/dict/bible/names/benjamin)" is a metonym that stands for his descendants. Jacob speaks about [Benjamin](rc://en/tw/dict/bible/names/benjamin)'s descendants as if they were a hungry wolf. This emphasizes that they will be fierce warriors. AT: "The descendants of [Benjamin](rc://en/tw/dict/bible/names/benjamin) will be like hungry wolves" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-metaphor]])