'Be of Good Courage' in the Bible

But the following night the Lord stood by him, and said, Be of good courage; for as thou hast testified the things concerning me at Jerusalem, so thou must bear witness at Rome also.

And now I exhort you to be of good courage, for there shall be no loss at all of life of any of you, only of the ship.

Wherefore be of good courage, men, for I believe God that thus it shall be, as it has been said to me.