"Mind your own business" is a common English saying which asks for a respect of other people's privacy.
Contextually, it is often used in an argument or dispute as a remark to refute, reject or discourage other peoples' concerns or comments.
The Greek phrase πράσσειν τὰ ἴδια, appearing in St. Paul's first letter to the Thessalonians, is usually translated as "mind your own business".
[1][2] The first coin that was minted and officially circulated by the United States, the Fugio Cent, displays the words “Mind Your Business” on the obverse.
[4] Folk etymology has it that this idiom was used in the colonial period when women would sit by the fireplace making wax candles together,[5] though there are many other theories.