He shall say: "Hear, Israel: Today you are going into battle against your enemies. Do not be fainthearted or afraid; do not be terrified or give way to panic before them." (NIV)
And shall say to them, Hear, O Israel, you draw near this day to battle against your enemies. Let not your [minds and] hearts faint; fear not, and do not tremble or be terrified [and in dread] because of them. (AMP)
And shall say unto them, Hear, O Israel, ye approach this day unto battle against your enemies: let not your hearts faint, fear not, and do not tremble, neither be ye terrified because of them; (KJV)