en_tn/pro/16/05.md

though they stand hand in hand

This is an idiom meaning “It is certain” or “Be sure of this” as when people shake hands to confirm an agreement or stand together in unity. See how you translated “It is certain” in Proverbs 11:21. (See: rc://en/ta/man/translate/figs-idiom)

they will not go unpunished

"they will be punished" (See: rc://en/ta/man/translate/figs-litotes)