וּבִשְׁנַת֙ שְׁמֹנֶ֣ה עֶשְׂרֵ֔ה לַמֶּ֖לֶךְ יָרָבְעָ֣ם בֶּן־נְבָ֑ט מָלַ֥ךְ אֲבִיָּ֖ם עַל־יְהוּדָֽה׃
Pada tahun kedelapan belas pemerintahan Raja Yerobeam bin Nebat, Abiam menjadi raja atas Yehuda.
Rashi
In the eighteenth year [of the reign] of King Yerovom. One year after Rechovom’s death, in the twentieth year of Yerovom, Asa reigned. The third year of Nodov (Aviyam) is counted for King Asa as a year, and for him it is also counted.