兔子不吃窝边草

tù zi bù chī wō biān cǎo

lit. a rabbit never eats the grass beside its own burrow (saying)

fig. even a scoundrel does not do harm in his immediate neighborhood

variant of 兔[tu4]

zi

noun suffix, as in 椅子[yi3 zi5] "chair"

no; not so

chī

variant of 吃[chi1]

nest

biān

side

cǎo

grass