Ezekiel 31:15

Thus saith the Lord God; In the day when he went down to the grave I caused a mourning: I covered the deep for him, and I restrained the floods thereof, and the great waters were stayed: and I caused Lebanon to mourn for him, and all the trees of the field fainted for him.

Cross-reference

Revelation 18:9-11 shows kings and merchants weeping over Babylon's fall — the same lament scene as the mourning over the cedar in this verse.

Revelation 18:19 has mourners throwing dust on their heads — a direct parallel to the mourning rituals described for the cedar's fall.