Here "lift up my hand" is a symbolic action that shows he will truly do what he has sworn to do. Alternate translation: "I solemnly swear" (See: [[rc://en/ta/man/translate/translate-symaction]])
The people experiencing shame are spoken of as if they will carry their shame. Alternate translation: "that people will certainly mock the nations that surround you" (See: [[rc://en/ta/man/translate/figs-metaphor]])