吃人家的嘴軟，拿人家的手軟 [－－－－－软－－－－－－软]

Jyutping hek3 jan4 gaa1 dik1 zeoi2 jyun5 ， naa4 jan4 gaa1 dik1 sau2 jyun5
Pinyin chī rén jia de zuǐ ruǎn ， nà rén jia de shǒu ruǎn

Definitions (Wiktionary)
  1. proverb
    One may be bound to others because of the things they give you.