וַיִּשְׁלַ֨ח אֹתָ֥ם מֹשֶׁ֛ה אֶ֥לֶף לַמַּטֶּ֖ה לַצָּבָ֑א אֹ֠תָם וְאֶת־פִּ֨ינְחָ֜ס בֶּן־אֶלְעָזָ֤ר הַכֹּהֵן֙ לַצָּבָ֔א וּכְלֵ֥י הַקֹּ֛דֶשׁ וַחֲצֹצְר֥וֹת הַתְּרוּעָ֖ה בְּיָדֽוֹ׃
And Moses sent them, a thousand of every tribe, to the war, them and Phinehas the son of Eleazar the priest, to the war, with the holy vessels and the trumpets for the alarm in his hand.
Read kabbalistic (mystical) interpretation of Numbers 31:6: and classical mystical sources.