הֲל֤וֹא צִוִּיתִ֙יךָ֙ חֲזַ֣ק וֶאֱמָ֔ץ אַֽל־תַּעֲרֹ֖ץ וְאַל־תֵּחָ֑ת כִּ֤י עִמְּךָ֙ יְהוָ֣ה אֱלֹהֶ֔יךָ בְּכֹ֖ל אֲשֶׁ֥ר תֵּלֵֽךְ׃ (פ)
Have not I commanded thee? Be strong and of good courage; be not affrighted, neither be thou dismayed: for the LORD thy God is with thee whithersoever thou goest.’
Find Mishnaic references to Joshua 1:9: , passages from the 63 tractates of the Mishnah.