Be careful (anxious) for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God. Phil. 4:6
Have not I commanded thee? Be strong and of a good courage; be not afraid, neither be thou dismayed: for the Lord thy God is with thee whithersoever thou goest. Joshua 1:9
And finally:
Be still, and know that I am God: I will be exalted among the heathen, I will be exalted in the earth. Psalm 46:10