A word to the wise is sufficient

Cultural  

1. Intelligent people can take hints; they don't need to have everything explained to them at great length.

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The phrase “a word to the wise” frequently accompanies a warning of some sort.

Example Sentences

A word to the wise is sufficient. 

From Project Gutenberg

Now, Tom, a word to the wise is sufficient.

From Project Gutenberg

The game is as often lost by a card too many as one too few; but a word to the wise is sufficient.

From Project Gutenberg

But a word to the wise is sufficient.

From Project Gutenberg

However, we anticipate an improvement in this respect, as we know "a word to the wise is sufficient."

From Project Gutenberg