הֲל֤וֹא צִוִּיתִ֙יךָ֙ חֲזַ֣ק וֶאֱמָ֔ץ אַֽל־תַּעֲרֹ֖ץ וְאַל־תֵּחָ֑ת כִּ֤י עִמְּךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ בְּכֹ֖ל אֲשֶׁ֥ר תֵּלֵֽךְ׃ (פ)
내가 네게 명한 것이 아니냐 마음을 강하게 하고 담대히 하라 두려워 말며 놀라지 말라 네가 어디로 가든지 네 하나님 여호와가 너와 함께 하느니라 하시니라
Tze'enah Ure'enah
“I command you” [1:9]. For I have commanded you that you should go to war, but have respect and also study Torah. It is also written concerning others, Torah and respect and do not fear the nations, since God is with you wherever you will turn.
Rashi
I have already commanded you to be stong and courageous. This was said in reference to actual war, as it is said: ‘Have no fear or trepidation.’ Where was he commanded this? He was so commanded in the time of Moshe, as it is said: ‘and command Yehoshua son of Nun etc.’18Devorim 31:23.
Metzudat David
I have commanded you to be strong in war opposite the enemy and to not be afraid.