1 Kings 15:1
In the eighteenth year of the reign of Jeroboam son of Nebat, Abijam became king of Judah,
Berean Standard Bible
Now in the eighteenth year of king Jeroboam the son of Nebat reigned Abijam over Judah.
Now in the eighteenth year of King Jeroboam the son of Nebat, Abijam began to reign over Judah.