Correct

养痈成患

/ yǎng yōng chéng huàn /
Strokes

Example

Definition

a carbuncle neglected becomes the bane of your life—leaving evil unchecked spells ruin

1
men
我们
yìng
bāo
包庇
huàirénhuàishì
坏人坏事
  
,
yīnwèi
因为
shì
yǎngyōngchénghuàn
养痈成患
  

We should not harbour evildoers or cover their evil deeds, because leaving evil unchecked spells ruin.