"Do not be afraid" is one of the most repeated lines in Scripture. Here are some of the promises behind it.
“After these things the Lord spoke to Abram in a vision, and said, ‘Fear not, Abram! I myself will defend you; your reward will be exceedingly great.’”
“Fear not, for I am with you; be not dismayed, for I am your God; I will strengthen you, I will help you, I will uphold you with my victorious right hand.”
“I have spoken to you in this way so that in me you may find peace. In the world you will find trouble; yet, take courage! I have conquered the world.”
“For you did not receive the spirit of a slave, to fill you once more with fear, but the spirit of adopted children, in which we cry ‘Abba, our Father.’”