Arcana Coelestia #369
369. So then, the meaning of the statements 'when they were in the field' and 'Cain rose up against Abel his brother and killed him' is this: When these two, faith and charity, existed from the doctrine of faith, faith separated from love inevitably regarded charity as being worthless and so annihilated it - like those people nowadays who assert that faith alone accomplishes salvation whether or not they perform any work of charity. This very supposition in itself annihilates charity, even though they know and profess with their lips that faith does not effect salvation unless love is present.
Joel 1:10-12
10
The field is laid waste. The land mourns, for the grain is destroyed, The new wine has dried up, and the oil languishes.
11
Be confounded, you farmers! Wail, you vineyard keepers; for the wheat and for the barley; for the harvest of the field has perished.
12
The vine has dried up, and the fig tree withered; the pomegranate tree, the palm tree also, and the apple tree, even all of the trees of the field are withered; for joy has withered away from the sons of men.