'Good Courage' in the Bible

Be strong and of a good courage. Do not fear nor be afraid of them. For Jehovah your God is He who goes with you. He will not fail you nor forsake you.

And Moses called to Joshua and said to him in the sight of all Israel, Be strong and of a good courage. For you must go with this people to the land which Jehovah has sworn to their fathers to give it to them, and you shall cause them to inherit it.

And he commanded Joshua the son of Nun, and said: Be strong and of a good courage. For you shall bring the sons of Israel into the land which I swore to them, and I will be with you.