literally meaning the one who hung the bell on the tiger's neck must be the one to untie it; used as a metaphor for solving a problem by going back to the person who caused it

Whoever started the trouble should be the one to end it; literally "to untie the bell, you still need the person who tied the bell"

literally "whoever hung the bell on the tiger's neck must be the one to untie it"; used as a proverb to mean that the person who caused a problem is the one responsible for solving it