Reference for II Chronicles 28:1

בֶּן־עֶשְׂרִ֤ים שָׁנָה֙ אָחָ֣ז בְּמָלְכ֔וֹ וְשֵׁשׁ־עֶשְׂרֵ֣ה שָׁנָ֔ה מָלַ֖ךְ בִּירוּשָׁלִָ֑ם וְלֹא־עָשָׂ֧ה הַיָּשָׁ֛ר בְּעֵינֵ֥י יְהוָ֖ה כְּדָוִ֥יד אָבִֽיו׃

Ahaz was twenty years old when he began to reign; and he reigned sixteen years in Jerusalem; and he did not that which was right in the eyes of the LORD, like David his father;

BDB