'Good Courage' in the Bible

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

Have not I commanded you? Be strong and of a good courage; be not afraid, neither be you dismayed: for the LORD your God is with you wherever you go.

Whosoever he be that does rebel against your commandment, and will not hearken unto 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 unto them, Fear not, nor be dismayed, be strong and of good courage: for thus shall the LORD do to all your enemies against whom you fight.