'Be Strong' in the Bible

Take heart, and let us be strong for our people and for the towns of our God; and may the Lord do what seems good to him.

And all will go well for you, if you take care to keep the laws and the rules which the Lord gave to Moses for Israel: be strong and take heart; have no fear and do not be troubled.

Now then, take note; for the Lord has made selection of you to be the builder of a house for the holy place. Be strong and do it.

And David said to his son Solomon, Be strong and of a good heart and do your work; have no fear and do not be troubled, for the Lord God, my God, is with you; he will not give you up, and his face will not be turned away from you, till all the work necessary for the house of the Lord is complete.