sweat of one's brow

Etymology
A reference to Genesis 3:17 and 19 in the Bible (King James Version; spelling modernized): “And unto he [God] said, because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, [...] In the sweat of thy face shalt thou eat bread, till thou return unto the ground: [...]”, meaning that due to disobedience to God, humans would henceforth have to exert labour for their food, causing their brows or foreheads to perspire.

Noun

 * 1)  The effort extended in (often manual) labour, and the value created thereby.
 * 2) * 1991 March 27, writing for the  in :
 * Making matters worse, these courts developed a new theory to justify the protection of factual compilations. Known alternatively as "sweat of the brow" or "industrious collection," the underlying notion was that copyright was a reward for the hard work that went into compiling facts.
 * 1) * 1991 March 27, writing for the  in :
 * Making matters worse, these courts developed a new theory to justify the protection of factual compilations. Known alternatively as "sweat of the brow" or "industrious collection," the underlying notion was that copyright was a reward for the hard work that went into compiling facts.

Translations

 * Dutch: in het zweet zijns aanschijns
 * Finnish: hiellä ja vaivalla, otsa hiessä
 * French:
 * Galician: suor da túa fronte
 * German:
 * Italian: col sudore della fronte
 * Norwegian:
 * Bokmål:
 * Polish:
 * Portuguese: com o suor do seu rosto
 * Russian:, в по́те лица́ своего́
 * Swedish: