<P> "The pot calling the kettle black" is a proverbial idiom that may be of Spanish origin of which English versions began to appear in the first half of the 17th century . The idiom is glossed in the original sources as being used of a person who is guilty of the very thing of which they accuse another and is thus an example of psychological projection . </P> <P> The earliest appearance of the idiom is in Thomas Shelton's 1620 translation of the Spanish novel Don Quixote . The protagonist is growing increasingly restive under the criticisms of his servant Sancho Panza, of which one is that "You are like what is said that the frying - pan said to the kettle,' Avant, black - browes' ." The Spanish text at this point reads: Dijo la sartén a la caldera, Quítate allá ojinegra (Said the pan to the pot, get out of there black - eyes). It is identified as a proverb (refrán) in the text, functioning as a retort to the person who criticises another of the same defect that he plainly has . Among several variations, the one where the pan addresses the pot as culinegra (black - arse) makes clear that they are dirtied in common by contact with the cooking fire . </P>

Where did the saying the pot calling the kettle black
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