'Be Strong' in the Bible

to abstain from things sacrificed to idols, and from blood, and from things strangled, and from fornication, keeping yourselves from which, ye will do well. Be strong.

And when it was reported to me of a plot going to be against the man by the Jews, I immediately sent him to thee, also having commanded the accusers to speak before thee the things against him. Be strong.

Watch ye, stand firm in the faith, act like men, be strong.

Finally my brothers, be strong in Lord and in the power of his might.

Thou therefore, my child, be strong in the grace in Christ Jesus.