Commentaries
20:45-49 Judah and Jerusalem had been full of people, as a forest of trees, but empty of fruit. God's word prophesies against those who bring not forth the fruits of righteousness. When He will ruin a nation, who or what can save it? The plainest truths were as parables to the people. It is common for those who will not be wrought upon by the word, to blame it.
46. south … south … south—three different Hebrew words, to express the certainty of the divine displeasure resting on the region specified. The third term is from a root meaning "dry," referring to the sun's heat in the south; representing the burning judgments of God on the southern parts of Judea, of which Jerusalem was the capital.
set thy face—determinately. The prophets used to turn themselves towards those who were to be the subjects of their prophecies.
drop—as the rain, which flows in a continuous stream, sometimes gently (De 32:2), sometimes violently (Am 7:16; Mic 2:6, Margin), as here.
forest—the densely populated country of Judea; trees representing people.