'Be Strong' in the Bible

Then you will prosper, if you are careful to observe and fulfill the statutes and ordinances which the Lord commanded Moses concerning Israel. Be strong and courageous, do not fear nor be dismayed.

Consider this carefully, for the Lord has chosen you to build a house for the sanctuary. Be courageous and strong and do it.”

Then David said to his son Solomon, “Be strong and courageous, and take action; do not fear nor be dismayed, for the Lord God, my God, is with you. He will not fail you nor abandon you [but will guide you in the construction] until you have finished all the work for the service of the house of the Lord.