騙得了一時，騙不了一世 [骗－－－时－骗－－－－]

Jyutping pin3 dak1 liu5 jat1 si4 ， pin3 bat1 liu5 jat1 sai3
Pinyin piàn de liǎo yī shí ， piàn bù liǎo yī shì

Definitions (Wiktionary)
  1. proverb
    you can fool people once but you cannot fool them forever