人の振り見て我が振り直せ
Meanings
1
one man's fault is another's lesson; learn from others' mistakes
Proverb meaning that observing others' behavior helps you correct your own. Often used as advice to reflect on your own actions when you see someone else's faults.
As the saying goes, 'one man's fault is another's lesson,' so let's take his failure as a lesson for ourselves.