The labour-power is a commodity, not capital, in the hands of the labourer, and it constitutes for him a revenue so long as he can continuously repeat its sale; it functions as capital after its sale, in the hands of the capitalist, during the process of production itself.
 Karl Marx, Das Kapital (1885). copy citation

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Author Karl Marx
Source Das Kapital
Topic power commodity
Date 1885
Language English
Reference
Note
Weblink https://www.marxists.org/archive/marx/works/download/pdf/Capital-Volume-...

Context

““serves in the function of a capital to him,” since he thereby incorporates labour-power in the material constituents of his capital and thus enables his capital to function altogether as productive capital. We must make this distinction: The labour-power is a commodity, not capital, in the hands of the labourer, and it constitutes for him a revenue so long as he can continuously repeat its sale; it functions as capital after its sale, in the hands of the capitalist, during the process of production itself. That which here serves twice is labour-power: as a commodity which is sold at its value, in the hands of the labourer; as a power-producing value and use-value, in the hands of the capitalist who has bought it.” source