Rashi, on Ps 96:5

“The mountains melted like wax, at the presence of the Lord: at the presence of the Lord of all the earth.”

“melted like wax Heb. כדונג, as it is written (Ezek. 38:20): “and the mountains will be thrown down, and the cliffs will fall.””

Imported from an open dataset — not yet checked against the printed edition.