Genesis 27:28

Therefore God give thee of the dew of heaven, and the fatness of the earth, and plenty of corn and wine. These were temporal gifts, of great importance in the country which Jacob and his children were to possess. The quantity of the dew, especially during the dry season, determined the fruitfulness of the land. The fat, productive fields of the earth were to be his, the result being a rich yield of grain and new wine.