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Phrase(s): Actions speak louder than words.
Prov. Cliché What you do is more significant than what you say. • You keep saying that you’ll do your fair share of the housework. Remember that actions speak louder than words.
McGrawhill's American Idioms And Phrasal Verbs
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What one does is more important than what one says, as in Politicians need to be reminded that actions speak louder than words. This statement, a proverb found in many languages, including ancient Greek, was first worded in precisely this way in English in Colonial Currency (1736). Also see ALL TALK; DO AS I SAY, NOT AS I DO.
American Heritage Idioms