en_tn/jer/25/01.md

the fourth year of Jehoiakim

After Jehoiakim ruled for 3 years but before he finished his forth (4) year as king.

the first year of Nebuchadnezzar

During the first year of Nebuchadnezzar's reign.

all the people of Judah and all the inhabitants of Jerusalem

These were the last of the Israelites. The northern kingdom had already fallen. (See: rc://en/ta/man/translate/figs-doublet)