What's done cannot be undone

What's done cannot be undone.

Prov. You cannot change what has already happened. Jill: I wish I hadn't insulted Maria. Jane: What's done cannot be undone. Jill soon regretted telling Mike that she loved him, but she knew that what's done cannot be undone.
See also: cannot, done
References in periodicals archive ?
What's done cannot be undone but what's not done can be avoided if only the people and Parliament have the courage to do it as more and more facts become known.
His parents know what's done cannot be undone. Understandably, they wish to see justice done and the lorry driver prosecuted.
After saying that Banquo is dead and cannot come out of his grave, Lady Macbeth observes that "there's knocking at the gate," and then she says, "What's done cannot be undone." Then she leaves the stage, as it happens, for good.
What's done cannot be undone. It's a commonplace phrase, almost a catchphrase, and was possibly already a cliche in Shakespeare's time.
What's done cannot be undone. Go through that gate, and you can't get back.
Shea used the words of Macbeth to warn President Milosevic: "What's done cannot be undone."