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Jyutping fong3 haa6 tou4 dou1 , laap6 dei6 sing4 fat6
Pinyin fàng xià tú dāo , lì dì chéng fó

Definitions (Wiktionary)
  1. proverb
    One can quickly become a good person if one repents and mends one's ways

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Jyutping fong3 haa6 tou4 dou1 laap6 dei6 sing4 fat6
Pinyin fàng xià tú dāo , lì dì chéng fó

Definitions (粵典–words.hk)
  1. 語句
    比喻​只要​真心​改惡​從善​,​就​即刻​成為​好人​;​佛教徒​亦​會​以​呢​句​諺語​勸​人​修行
    to correct one's mistake and to be an upright person again; to repent and be absolved of one's crimes; literally: to lay down the butcher's knife and become a Buddha on the spot

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Jyutping fong3 haa6 tou4 dou1 , laap6 dei6 sing4 fat6
Pinyin fàng xià tú dāo , lì dì chéng fó

Definitions (CC-CEDICT)
  1. lay down butcher's knife, become a Buddha on the spot (idiom); instant rehabilitation
  2. to repent and be absolved of one's crimes