有食唔食，罪大惡極 [－－－－－－－恶极]

Jyutping jau5 sik6 m4 sik6 ， zeoi6 daai6 ok3 gik6
Pinyin yǒu shí wú shí ， zuì dà è jí

Definitions (Wiktionary)
  1. proverb, Cantonese, Hong-Kong
    if one can enjoy something but chooses to decline it, one has committed a grave sin