不見兔子不撒鷹 [－见－－－－鹰]

Jyutping bat1 gin3 tou3 zi2 bat1 saat3 jing1
Pinyin bù jiàn tù zi bù sā yīng

Definitions (CC-CEDICT)
  1. you don't release the hawk until you've seen the hare (idiom)
  2. one doesn't act before one is sure to succeed