by the sweat of your brow
by the sweat of (one's) brow
Through or because of one's own efforts or hard work. By the sweat of his brow, my father turned a barren little plot of land into the flourishing farm you see today. This pair of entrepreneurs has created a billion-dollar company by the sweat of their brow.
by the sweat of your browLITERARY
If you earn the money that you live on by the sweat of your brow, you earn it through doing hard physical work. Most people are no longer earning their bread by the sweat of their brow.
by the sweat of your browby your own hard work, typically manual labour.
This idiom is often used with reference to God's sentence on Adam after the Fall, condemning him to work for his food: ‘In the sweat of thy face shalt thou eat bread’ (Genesis 3:19).