Reference for II Chronicles 36:9

בֶּן־שְׁמוֹנֶ֤ה שָׁנִים֙ יְהוֹיָכִ֣ין בְּמָלְכ֔וֹ וּשְׁלֹשָׁ֤ה חֳדָשִׁים֙ וַעֲשֶׂ֣רֶת יָמִ֔ים מָלַ֖ךְ בִּירוּשָׁלִָ֑ם וַיַּ֥עַשׂ הָרַ֖ע בְּעֵינֵ֥י יְהוָֽה׃

Jehoiachin was eight years old when he began to reign; and he reigned three months and ten days in Jerusalem; and he did that which was evil in the sight of the LORD.

BDB

BDB