水至清則無魚，人至察則無徒 [－－－则无鱼－－－－则无－]

Jyutping
Pinyin shuǐ zhì qīng zé wú yú , rén zhì chá zé wú tú

Definitions (CC-CEDICT)

water that is too clear has no fish, and one who is too severe has no friends (idiom)