Isaiah 64:3
When thou didst terrible things which we looked not for, thou camest down, the mountains flowed down at thy presence.
Cross-reference
Judges 5:4 describes the earth trembling at God's march, matching the mountains quaking in the theophany.
In Judges 5:5, the same image of mountains melting at God's presence appears in Deborah's song, reinforcing the theophany motif.
Psalm 66:3 calls God's works 'terrible', directly echoing the language of awesome deeds found here.
Psalm 66:5 invites people to see God's terrible works, paralleling the theme of God's awesome actions.
Psalm 68:8 describes the earth shaking and mountains moving at God's presence, mirroring the theophany here.
Psalm 106:22 explicitly mentions 'terrible things' at the Red Sea, directly paralleling the language here.
Habakkuk 3:3 also depicts God coming in splendor with the earth trembling, echoing the theophany of mountains quaking in Isaiah.
Habakkuk 3:6 directly matches the mountain-shaking image: 'eternal mountains were scattered' — same divine power over mountains.
Nehemiah 9:13 describes God coming down on Sinai to give the law, the same descent and mountain quaking referenced in Isaiah.
Deuteronomy 10:21 praises God for great and terrifying deeds, similar to the awesome acts mentioned.
Exodus 34:10 recounts God doing marvels no nation has seen, echoing the 'awesome things' performed by God.
Deuteronomy 4:34 lists signs and wonders God did in Egypt, paralleling the awesome deeds recalled in the verse.
Psalm 105:27-36 recounts the plagues in Egypt as God's terrible wonders, a specific example of such deeds.
In 2 Samuel 7:23, God's terrible deeds for Israel are recounted, paralleling the awe-inspiring acts mentioned here.