A word spoken is past recalling.

一言既出，駟馬難追。

發音	Pronounce yī yán jì chū sz̀ mǎ nán juēi
解釋	Explanation (諺語)一句話說出口，就是四匹馬拉的車也追不上。比喻話已說出口，難再收回。【例】大丈夫一言既出，駟馬難追，豈有反悔的道理。
英文解釋	It is impossible to withdraw one’s words or undo their effects once they have been spoken aloud.
英文造句	Amy: “I told her I was sorry for what I said. I was only joking, but I should have known better.” Bob: “It’s going to take more than that to win her back. A word spoken is past recalling.”