君子一言，驷马难追 (君子一言，駟馬難追) jūnzi yīyán, sì mǎ nán zhuī

jūnzi yīyán, sì mǎ nán zhuī phrase a nobleman's word is his bond
Domain: Proverb 谚语
Notes: (CC-CEDICT '君子一言，駟馬難追')