井水不犯河水 (jǐng shuǐ bú fàn hé shuǐ)

井水不犯河水

(jǐng shuǐ bú fàn hé shuǐ)
English Translation:“Well water does not interfere with river water.”

Meaning:
Mind your own business. This proverb emphasizes the importance of focusing on your own affairs rather than interfering with others.

Example:
我们两家之间应该保持和谐，井水不犯河水。
(We should maintain harmony between our families, “mind your own business.”)

Source: Hello Mandarin