'Be Strong' in the Bible

“Therefore, you shall keep all the commandments which I am commanding you today, so that you may be strong and go in and take possession of the land which you are crossing over [the Jordan] to possess;

Be strong and courageous, do not be afraid or tremble in dread before them, for it is the Lord your God who goes with you. He will not fail you or abandon you.”

Then Moses called to Joshua and said to him in the sight of all [the people of] Israel, “Be strong and courageous, for you will go with this people into the land which the Lord has sworn to their fathers to give them, and you will give it to them as an inheritance.

Then He commanded and commissioned Joshua, the son of Nun, and said, “Be strong and courageous, for you will bring the sons of Israel into the land which I have sworn to give them, and I will be with you.”