Deuteronomy 20:3

20:3 and shall tell them, Hear, Israel, you draw near this day to battle against your enemies: don't let your heart faint; don't be afraid, nor tremble, neither be scared of them;
-World English Bible

Other Translation

20:3 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;
-King James Version