וְכִֽי־תָבֹ֨אוּ מִלְחָמָ֜ה בְּאַרְצְכֶ֗ם עַל־הַצַּר֙ הַצֹּרֵ֣ר אֶתְכֶ֔ם וַהֲרֵעֹתֶ֖ם בַּחֲצֹצְר֑וֹת וֲנִזְכַּרְתֶּ֗ם לִפְנֵי֙ יְהוָ֣ה אֱלֹֽהֵיכֶ֔ם וְנוֹשַׁעְתֶּ֖ם מֵאֹיְבֵיכֶֽם׃
또 너희 땅에서 너희가 자기를 압박하는 대적을 치러 나갈 때에는 나팔을 울려 불지니 그리하면 너희 하나님 여호와가 너희를 기억하고 너희를 너희 대적에게서 구원하리라
Mishnah Rosh Hashanah
On [public] fast days they used shofars of rams, curved, the mouths of which were covered with silver, and there were two trumpets in between them. A short blast was made with the shofars and a long one with the trumpets, because the mitzvah of the day is with trumpets.