Read Isaiah 35:4-7a
35:4 Say to those who are of a fearful heart, "Be strong, do not fear! Here is your God. He will come with vengeance, with terrible recompense. He will come and save you."
35:5 Then the eyes of the blind shall be opened, and the ears of the deaf unstopped;
35:6 then the lame shall leap like a deer, and the tongue of the speechless sing for joy. For waters shall break forth in the wilderness, and streams in the desert;
35:7a the burning sand shall become a pool, and the thirsty ground springs of water.
Verse 4 - "Say to those who are of a fearful heart, "Be strong, do not fear! Here is your God..."
Isaiah prophesies hope to people living in exile - reminding them that God is with them, and that God is doing what God has promised - saving his people, bringing relief.
Speak to my fearful heart. Give me strength. Let me know that you are with me.