一言既出，驷马难追

Chinese

For pronunciation and definitions of 一言既出，驷马难追 – see 一言既出，駟馬難追 (“once said, a team of horses cannot unsay it; A word once spoken cannot be taken back; A promise must be kept”). (This term is the simplified form of 一言既出，駟馬難追).

Notes: Simplified Chinese is mainly used in Mainland China, Malaysia, and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.