'Good Courage' in the Bible

Be strong and of good courage. For you shall divide for an inheritance to this people, the land which I swore to their fathers, to give it to them.

Have I not commanded you? Be strong and of good courage. Do not be afraid, neither be dismayed. For Jehovah your God is with you in all places where you go.

Whoever rebels against your command and will not listen to your words in all that you command him, he shall be put to death. Only be strong and of a good courage.

And Joshua said to them, Do not fear nor be dismayed. Be strong and of good courage. For so shall Jehovah do to all your enemies against whom you fight.