Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetry in 25:30-38.
Babylon will rule over Judah for seventy years. Because Yahweh is just, he will soon punish Babylon for their evil actions. (See: [[rc://en/tw/dict/bible/kt/justice]] and [[rc://en/tw/dict/bible/kt/evil]])
Jeremiah uses the idiom of drinking the cup of wine of God's punishment to say that Babylon will destroy all the surrounding nations and then be destroyed. (See: [[rc://en/ta/man/translate/figs-idiom]])