Possible meanings are 1) clothing is a metonym for what a person feels, "will have no hope," or 2) "will dress in clothes that show he is mourning." (See: [[rc://en/ta/man/jit/figs-idiom]] and [[rc://en/ta/man/jit/figs-metonymy]])
The word "hands" is a synecdoche for the people. Alternate translation: "the people of the land will be so afraid that their hands will tremble" (See: [[rc://en/ta/man/jit/figs-synecdoche]])