Isaiah 64:3

3 When you did awesome deeds that we did not expect, you came down, the mountains quaked at your presence.

Isaiah 64:3 Meaning and Commentary

Isaiah 64:3

When thou didst terrible things, which we looked not for, thou
camest down
Referring to the wonderful things God did in Egypt, at the Red sea, and in the wilderness, and particularly at Mount Sinai, things that were unexpected, and not looked for; then the Lord came down, and made visible displays of his power and presence, especially on Mount Sinai; see ( Exodus 19:18 ) : the mountains flowed down at thy presence;
not Sinai only, but others also; Kimchi says Seir and Paran; ( Judges 5:4 Judges 5:5 ) ( Psalms 68:7 Psalms 68:8 ) ( Habakkuk 3:3 Habakkuk 3:6 ) .

Isaiah 64:3 In-Context

1 O that you would tear open the heavens and come down, so that the mountains would quake at your presence—

2 as when fire kindles brushwood and the fire causes water to boil— to make your name known to your adversaries, so that the nations might tremble at your presence!

3 When you did awesome deeds that we did not expect, you came down, the mountains quaked at your presence.

4 From ages past no one has heard, no ear has perceived, no eye has seen any God besides you, who works for those who wait for him.

5 You meet those who gladly do right, those who remember you in your ways. But you were angry, and we sinned; because you hid yourself we transgressed.