他山の石以て玉を攻むべし（たざんのいしもってたまをおさむべし）

Japanese vocabulary

Meaning: one should learn from other's mistakes; stones from other mountains can be used to polish one's own gems

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “他山の石以て玉を攻むべし” pronounced in real videos (YouGlish)