I Chronicles 25:30 Midrash

לִשְׁלֹשָׁ֤ה וְעֶשְׂרִים֙ לְמַ֣חֲזִיא֔וֹת בָּנָ֥יו וְאֶחָ֖יו שְׁנֵ֥ים עָשָֽׂר׃

For the three and twentieth to Mahazioth, his sons and his brethren, twelve;

Read midrashic interpretation of I Chronicles 25:30: and classical rabbinic exegesis.