1 Kings 15:1

Abijah’s Reign over Judah

15:1 In the eighteenth year of the reign of Jeroboam son of Nebat, Abijah ¹  became king over Judah.

1 Kings 15:9

Asa’s Reign over Judah

15:9 In the twentieth year of Jeroboam’s reign over Israel, Asa became the king of Judah.

[15:1]  ¹ tc The Old Greek also has the phrase “the son of Rehoboam.”