一言既出，驷马难追 (一言既出，駟馬難追) yīyán jì chū, sì mǎ nán zhuī

1. yīyán jì chū, sì mǎ nán zhuī phrase once said, a team of horses cannot unsay it; a promise must be kept
   Domain: Proverb 谚语
   Notes: (CC-CEDICT '一言既出，駟馬難追')
2. yì yán jì chū, sì mǎ nán zhuī phrase a word spoken is an arrow let fly
   Domain: Buddhism 佛教 , Subdomain: Fo Guang Shan
   Notes: (Glossary of Humanistic Buddhism)