驕兵必敗（きょうへいひっぱい）

Japanese vocabulary

Meaning: defeat is inevitable for an overconfident army; being arrogant and overconfident inevitably leads to defeat; pride comes before a fall

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “驕兵必敗” pronounced in real videos (YouGlish)