The phrase "A plague on both your houses" comes from William Shakespeare's play "Romeo and Juliet." This quote captures the intense conflict and tragic consequences stemming from the feud between the Montague and Capulet families. The character Mercrutio utters these words after being mortally wounded, expressing his disdain for both families, suggesting that neither side is innocent. It highlights the futility of their rivalry and the suffering it causes.

This quote serves as a poignant reflection on the destructive nature of hatred and rivalry. It underscores how the enmity between the two families ultimately leads to tragic outcomes for their children, Romeo and Juliet. Shakespeare uses this moment to emphasize that blind allegiance to family honor can bring about disastrous consequences for everyone involved.