turnabout is fair play

used to suggest that it is acceptable to retaliate against someone who has wronged one in the same manner

The origin of the proverb "turnabout is fair play" is not definitively documented, but it aligns with sentiments expressed in various cultures and historical contexts. It implies that if someone treats one unfairly, responding in a similar manner is justified. This proverb reflects the notion of justice through equality in actions, although it is important to consider whether such retaliation leads to resolution or further harm.