Wages, the value of a definite quantity of living labour, are always less than the value of the product begotten by this same quantity of living labour or in which this quantity is embodied.
 Karl Marx, Das Kapital (1885). copy citation

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

Context

“The two points which caused its failure were these:
1. Labour is the measure of value. However, living labour in its exchange with capital has a lower value than materialised labour for which it is exchanged. Wages, the value of a definite quantity of living labour, are always less than the value of the product begotten by this same quantity of living labour or in which this quantity is embodied. The question is indeed insoluble, if put in this form. It has been correctly formulated by Marx and thereby been answered. It is not labour which has a value. As an activity which creates values it can no more have any special value than gravity can have any special weight, heat any special temperature, electricity any special strength of current.” source