1 Chronicles 22:13

22:13 Then shall you prosper, if you observe to do the statutes and the ordinances which Yahweh gave Moses concerning Israel. Be strong, and of good courage. Don't be afraid, neither be dismayed.
-World English Bible

Other Translation

22:13 Then shalt thou prosper, if thou takest heed to fulfil the statutes and judgments which the LORD charged Moses with concerning Israel: be strong, and of good courage; dread not, nor be dismayed.
-King James Version