'Be Strong' in the Bible

Be strong and be active; ye shall not fear, and ye shall not be terrified from their face, for Jehovah thy God, he goes with thee; he will not relax thee and he will not forsake thee.

And Moses will call to Joshua and say to him before the eyes of all Israel, Be strong and be active, for thou shalt go in with this people to the land which Jehovah sware to thy fathers to give to them; and thou shalt cause them to inherit it

And he will command Joshua the son of Nun, and will say, Be strong and active: for thou shalt bring in the sons of Israel to the land which I sware to them, and I will be with thee.