日時毋好講人,暗時毋好講鬼 [-时--讲---时--讲-]

Jyutping jat6 si4 mou4 hou2 gong2 jan4 , ngam3 si4 mou4 hou2 gong2 gwai2
Pinyin rì shí wú hǎo jiǎng rén , àn shí wú hǎo jiǎng guǐ

Definitions (Wiktionary)
  1. proverb, Hakka
    a closed mouth catches no flies