אֶ֚לֶף לַמַּטֶּ֔ה אֶ֖לֶף לַמַּטֶּ֑ה לְכֹל֙ מַטּ֣וֹת יִשְׂרָאֵ֔ל תִּשְׁלְח֖וּ לַצָּבָֽא׃
Of every tribe a thousand, throughout all the tribes of Israel, shall ye send to the war.’
Read kabbalistic (mystical) interpretation of Numbers 31:4: and classical mystical sources.