In Genesis 3:19, this signifies aversion to celestial matters. (Arcana Coelestia 275)

275. Verse 19 With sweat on your brow you will eat bread, till you return to the ground, for out of it you were taken; for you are dust, and to dust you will return.

'Eating bread with sweat on the brow' means strong dislike of what is celestial. 'Returning to the ground from which he was taken' is reverting to the external man, such as he was before regeneration took place. 'He was dust and would return to dust' means that he was condemned and hellish.