יְהוָ֣ה צְבָא֣וֹת עִמָּ֑נוּ מִשְׂגָּֽב־לָ֝נוּ אֱלֹהֵ֖י יַעֲקֹ֣ב סֶֽלָה׃
만군의 여호와께서 우리와 함께 하시니 야곱의 하나님은 우리의 피난처시로다
Sefer HaMiddot
6. An effective way to nullify fear is to say "Hashem Tzva-os" (t.n. This is probably an inference to the verses in Psalms 46:8, 84:13, 20:10. These three verses are found together throughout the prayers and are known for their saving powers).