it is an ill bird that (fouls|defiles) its own nest
1
used to advise against harming one's own environment, community, or relationships, as it will ultimately lead to negative consequences for oneself
The proverb "it is an ill bird that fouls its own nest" appears in various collections of proverbs, such as those in French idioms. However, the exact origin of this expression is not well-documented, and its earliest known usage remains unclear. The saying reflects the value of loyalty and responsibility, encouraging people to protect and nurture their own foundations rather than harm them. It serves as a reminder that individuals should avoid actions that damage their own interests or relationships.
- The business owner who mistreated their employees was a reminder that it is an ill bird that fouls its own nest, as their actions ultimately led to high turnover rates and damaged their own business.