Ezra 2:17 Kabbalah

בְּנֵ֣י בֵצָ֔י שְׁלֹ֥שׁ מֵא֖וֹת עֶשְׂרִ֥ים וּשְׁלֹשָֽׁה׃ (ס)

The children of Bezai, three hundred twenty and three.

Read kabbalistic (mystical) interpretation of Ezra 2:17: and classical mystical sources.