| 结驷连骑 | jié sì lián qí | carriage drawn by four horses (idiom) | |
| 君子一言,驷马难追 | jūn zǐ yī yán , sì mǎ nán zhuī | a nobleman's word is his bond (proverb) | |
| 驷不及舌 | sì bù jí shé | What is said cannot be unsaid. (idiom) | |
| 一言既出,驷马难追 | yī yán jì chū , sì mǎ nán zhuī | lit. once said, a team of horses cannot unsay it (idiom); a promise must be kept |