I Chronicles 9:6 Midrash

וּמִן־בְּנֵי־זֶ֖רַח יְעוּאֵ֑ל וַאֲחֵיהֶ֖ם שֵׁשׁ־מֵא֥וֹת וְתִשְׁעִֽים׃

And of the sons of Zerah: Jeuel, and their brethren, six hundred and ninety.

Read midrashic interpretation of I Chronicles 9:6: and classical rabbinic exegesis.