Hebrews 10:38 KJV
In the beginning, God created man and placed him in Eden. He was assigned the job of subduing the Earth. After the fall, things changed, and things were changed. God told the man, “By the sweat of your face You will eat bread, Till you return to the ground, Because from it you were taken; For you are dust, And to dust you shall return.” (Genesis 3:19).
It was by the sweat of the brow that Adam was told that he would eat his food after the tree of the knowledge of good and evil had been eaten. It would be with thorns and thistles and hardship all the days of his life. And in the end, as God has originally warned him, he would die (Genesis 2:17).