Horns of ivory and ebony

'Horns of ivory and ebony,' as mentioned in Ezekiel 27:15, signify exterior good things relating to worship or rituals. (Arcana Coelestia 1172)

Jeremiah 49:30

³⁰ Flee, wander far off, dwell in the depths, you inhabitants of Hazor, says Yahweh; for Nebuchadnezzar king of Babylon has taken counsel against you, and has conceived a purpose against you.