1 Kings 15:1

And in the eighteenth year of the reign of Jeroboam son of Nabat, Abiu son of Roboam reigns over Juda.

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.