Melachim Alef 15:1

1 5 Now in the eighteenth year of Melech Yarov‘am Ben Nevat reigned Aviyam over Yehudah.

Melachim Alef 15:1 Meaning and Commentary

1 Kings 15:1

Now in the eighteenth year of King Jeroboam the son of Nebat
reigned Abijam over Judah.
] That is, began to reign; and by this it appears that Rehoboam was in the eighteenth year of his reign when he died, for he and Jeroboam began their reign at the same time.

Melachim Alef 15:1 In-Context

1 5 Now in the eighteenth year of Melech Yarov‘am Ben Nevat reigned Aviyam over Yehudah.

2 Shalosh shanim reigned he in Yerushalayim. And shem immo was Ma’achah Bat Avishalom.

3 And he walked in all the chattot Aviv, which he had done before him; and his lev was not shalem (fully devoted) to Hashem Elohav, as the levav Dovid Aviv.

4 Nevertheless l’ma’an Dovid (for the sake of Dovid) did Hashem Elohav give him a ner (lamp) in Yerushalayim, to raise up Bno after him, and to establish Yerushalayim;

5 Because Dovid did that which was yashar in the eyes of Hashem, and turned not aside from any thing that He commanded him all the days of his life, except only in the matter of Uriyah HaChitti (the Hittite).