'Do Not Be Afraid' in the Bible

Then you will prosper, if you observe to do the statutes and the ordinances which the LORD gave Moses concerning Israel. Be strong, and courageous. Do not be afraid, neither be dismayed.

David said to Solomon his son, "Be strong and courageous, and do it. Do not be afraid, nor be dismayed; for the LORD God, even my God, is with you. He will not fail you, nor forsake you, until all the work for the service of the house of the LORD is finished.