וַיֹּ֨אמֶר יְהוָ֤ה אֶל־יְהוֹשֻׁ֙עַ֙ אַל־תִּירָ֣א מֵהֶ֔ם כִּ֥י בְיָדְךָ֖ נְתַתִּ֑ים לֹֽא־יַעֲמֹ֥ד אִ֛ישׁ מֵהֶ֖ם בְּפָנֶֽיךָ׃
And the LORD said unto Joshua: ‘Fear them not; for I have delivered them into thy hand; there shall not a man of them stand against thee.’
Read kabbalistic (mystical) interpretation of Joshua 10:8: and classical mystical sources.