One field rained upon and one not
In Amos 4:7, this signifies the doctrine of faith from charity, and the doctrine of faith without charity. (Arcana Coelestia 382[2])
Arcana Coelestia #480
480. It is clear from Genesis 1:26-27 as well, that 'they were called Man on the day in which they were created', that is to say, at the end of the sixth day, which answers to the evening of the Sabbath, or start of the Sabbath or seventh day. For as shown already, the seventh day or Sabbath is the celestial man.