Isaiah 30:19-21, 23-26
Chapter 30
When the Lord has given you the bread of anguish and the water of distress, he, your teacher will hide no longer.
Your own eyes will see him, and your ear will listen to his words behind you: “This is the way, walk in it.”
He will then give rain for the seed you sow and make the harvest abundant from the crops you grow. On that day, your cattle will graze in wide pastures.
Your beasts of burden will eat silage tossed to them with a pitchfork and shovel.
For on the day of the great slaughter, when fortresses fall, streams of water will flow on every mountain and lofty hill.
When the Lord binds up the wounds of his people and heals the bruises inflicted by his blows, the light of the moon will be as the light of the sun, and the light of the sun seven times greater, like the light of seven days.

Commentaries
Various Oracles.
Chapters 28-33 mainly describe the events caused by the Assyrians between 701 and 691 B.C. Some suggest that a common theme throughout this section is the repeated use of the word “woe” at the beginning of each of the six messages: 28:1; 29:1.15; 30:1; 31:1; 33:1.
Conversion of the People.
The stubborn people had become blind and deaf (29:18). God, who is faithful to his covenant and compassionate, offers them the gift of conversion and guides them like a teacher (20-21). The people will abandon their idols (22), and God will bless them with rain and an abundance of fruits of the earth and livestock (23).