2 Peter 3:10-12

But the day of the Lord will come as a thief; in which the heavens will pass away with a great noise, and the elements will melt with fervent heat, and the earth and the works that are therein will be burned up.

Revelation 20:11

And I saw a great white throne, and him who sat on it, from whose face the earth and the heaven fled away, and no place was found for them.

Treasury of Scripture Knowledge

Summary

And the mountains shall be molten under him, and the valleys shall be cleft, as wax before the fire, and as the waters that are poured down a steep place.

Bible References

The mountains

2 Peter 3:10
But the day of the Lord will come as a thief; in which the heavens will pass away with a great noise, and the elements will melt with fervent heat, and the earth and the works that are therein will be burned up.
Revelation 20:11
And I saw a great white throne, and him who sat on it, from whose face the earth and the heaven fled away, and no place was found for them.