不為已甚 [－为－－]

Jyutping bat1 wai4 ji5 sam6
Pinyin bù wéi yǐ shèn

Definitions (CC-CEDICT)
  1. refrain from going to extremes in meting out punishment
  2. not be too hard on subject
Definitions (Wiktionary)
  1. phrase, idiomatic
    to not go too far; to refrain from going to extremes; to never go beyond reasonable limits