Those who live in glass houses should not throw stones

The phrase "Those who live in glass houses should not throw stones" is a proverb that means that people who are vulnerable to criticism or who have their own faults should refrain from criticizing others. It serves as a warning against hypocrisy and highlights the idea that everyone has their own weaknesses or issues, and it's unwise to judge or attack others when one's own situation is under scrutiny. The expression uses the metaphor of a glass house, which is transparent and exposes any flaws.