liú​shuǐ​bù​fǔ

flowing water never goes bad

Senses

流水不腐 liú​shuǐ​bù​fǔ flowing water never goes bad

flowing water does not rot; used as a metaphor to mean that constant activity or practice prevents stagnation and keeps one healthy or sharp

References

see 流水不腐/流水不腐 流水不腐,户枢不蠹/流水不腐,戶樞不蠹
see 户枢不蠹/戶樞不蠹 流水不腐/流水不腐