兔子不吃窩邊草 [－－－－窝边－]

Jyutping tou3 zi2 bat1 hek3 wo1 bin1 cou2
Pinyin tù zi bù chī wō biān cǎo

Definitions (CC-CEDICT)
  1. lit. a rabbit never eats the grass beside its own burrow (idiom)
  2. fig. even a scoundrel does not do harm in his immediate neighborhood
Definitions (Wiktionary)
  1. proverb
    don't shit where you eat; don't dip your pen in company ink