未蒙其利，先受其害 [－－－－－－－－－]

Jyutping mei6 mung4 kei4 lei6 ， sin1 sau6 kei4 hoi6
Pinyin wèi méng qí lì ， xiān shòu qí hài

Definitions (Wiktionary)
  1. phrase, idiomatic
    to receive damage from something long before getting any benefit from it