en_tn/jer/25/30.md

Yahweh will roar

Jeremiah speaks of Yahweh shouting very loudly as if he were roaring like a lion. (See: rc://en/ta/man/jit/figs-metaphor)

from the heights

This phrase is a metonym for heaven. Alternate translation: "from heaven" (See: rc://en/ta/man/jit/figs-metonymy)

he will roar mightily against his fold

Jeremiah speaks of Yahweh as if he were a lion and his people were a flock of sheep. The people will be helpless when Yahweh comes to punish them, as sheep are helpless when a lion attacks. (See: rc://en/ta/man/jit/figs-metaphor)

those who tread the grapes

This refers to people who crush grapes in a winepress with their feet in order to make wine.