וְלֵוִי֙ וּבִנְיָמִ֔ן לֹ֥א פָקַ֖ד בְּתוֹכָ֑ם כִּֽי־נִתְעַ֥ב דְּבַר־הַמֶּ֖לֶךְ אֶת־יוֹאָֽב׃
But Levi and Benjamin he did not number among them; for the king’s word was abominable to Joab.
Read kabbalistic (mystical) interpretation of I Chronicles 21:6: and classical mystical sources.