Spilt water will not return to the tray.

Spilt water will not return to the tray. — One of the meanings of this proverb could be… It’s no use crying over spilt milk. / A separated couple can never go back to as it was. Original meaning comes from an old Chinese story of a couple, but the proverb is often used in a more general sense today. (This is a Japanese proverb, saying, or idiom)