Reference for II Chronicles 36:11

בֶּן־עֶשְׂרִ֧ים וְאַחַ֛ת שָׁנָ֖ה צִדְקִיָּ֣הוּ בְמָלְכ֑וֹ וְאַחַ֤ת עֶשְׂרֵה֙ שָׁנָ֔ה מָלַ֖ךְ בִּירוּשָׁלִָֽם׃

Zedekiah was twenty and one years old when he began to reign; and he reigned eleven years in Jerusalem;

BDB

BDB