'Do Not Fear' in the Bible

And David said to him, Do not fear, for I will surely show you kindness for Jonathan your father's sake, and will restore you all the land of Saul your father. And you shall eat bread at my table forever.

And Absalom had commanded his servants, saying, And watch when Amnon's heart is merry with wine, and when I say to you, Strike Amnon, you shall kill him. Do not fear. Have I not commanded you? Be courageous, and be brave.