liǎng​hǔ​xiāng​zhēng, bì​yǒu​yī​shāng

mutual harm

两虎相争,必有一伤 (兩虎相爭,必有一傷) liǎng​hǔ​xiāng​zhēng, bì​yǒu​yī​shāng
mutual harm
lit. if two tigers fight, one will get injured; fig. if two powerful parties engage in conflict, someone is bound to get hurt.

Cross-References

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Definitions
CC-CEDICT