無心插柳柳成陰 [无－－－－－阴]

Jyutping mou4 sam1 caap3 lau5 lau5 sing4 jam1
Pinyin wú xīn chā liǔ liǔ chéng yīn

Definitions (CC-CEDICT)
  1. lit. idly poke a stick in the mud and it grows into a tree to shade you
  2. (fig.) unintentional actions may bring unexpected success
  3. also written 無心插柳柳成蔭|无心插柳柳成荫