Jer 25:1-3
The word that occurred to Jeremiah concerning all the people of Judah in the fourth year of Jehoiakim the son of Jo·si′ah, the king of Judah, that is, the first year of Nebuchadrezzar the king of Babylon; 2 which Jeremiah the prophet spoke concerning all the people of Judah and concerning all the inhabitants of Jerusalem, saying: 3 “From the thirteenth year of Josiah the son of Amon, the king of Judah, and down to this day, these twenty-three years the word of Jehovah has occurred to me, and I kept speaking to YOU people, rising up early and speaking, but YOU did not listen.
Key points
23 years from 13th year of Josiah to 4th year of Jehoiakim. The 4th year of Jehoiakim is also the 1st year of Nebuchadnezzar.