'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.

Then David said to Solomon his son, "Be strong and courageous, and do [this]! Do not be afraid and do not be dismayed, for Yahweh God, my God, [is] with you. He will not fail you and will not forsake you until all the work of the service of the house of Yahweh is finished.