'Fear Not' in the Bible

And David said unto him, Fear not: 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 continually.

Now Absalom had commanded his servants, saying, Mark you now when Amnon's heart is merry with wine, and when I say unto you, Strike Amnon; then kill him, fear not: have not I commanded you? be courageous, and be valiant.