Edom may have drunk in celebration of Jerusalem’s fall together with her allies, but ultimately Edom will be forced to drink from the Lord's cup of wrath (Psalm 75:7–8; Isaiah 51:17–23; Jeremiah 25:15–27). The cup and drinking are often used as a metaphor for divine judgment (Jeremiah 49:12–13; Ezekiel 23:31–34).1
16 For as you have drunk on my holy mountain, so all the nations shall drink continually; they shall drink and swallow, and shall be as though they had never been.