A witty concise proverb like saying is called

The answer is Aphorism.

An aphorism is a brief saying or phrase that expresses an opinion or makes a statement of wisdom without the flowery language of a proverb.

Aphorisms are often used to teach a lesson while speaking in plain terms. For example, “A bad penny always turns up” is an aphorism for the fact that bad people or things are bound to turn up in life. We just have to deal with them when they do.

Omit means cleave out .

All of the above
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b
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d