carry coals to Newcastle

To do something unnecessary; bring or furnish something of which there is plenty.
The man who waters his grass after a good rain is carrying coals to Newcastle.
Joe was carrying coals to Newcastle when he told the doctor how to cure a cold.
(Newcastle is an English city near many coal mines, and coal is sent out from there to other places.)

Categories: verb

An client error occurred: Error calling GET https://www.googleapis.com/youtube/v3/search?part=id%2Csnippet&q=%22carry+coals+to+Newcastle%22&maxResults=4&videoEmbeddable=true&safeSearch=strict&videoCategoryId=27&type=video&key=AIzaSyCfLRuAZZNAQm6a5uDzgY-Tt668bxsppCs: (403) Daily Limit Exceeded