Ephesians 6:10 in the King James Version
Finally, my brethren, be strong in the Lord, and in the power of his might.
Context
9 You masters, do the same things to them, and give up threatening, knowing that he who is both their Master and yours is in heaven, and there is no partiality with him.
10 Finally, be strong in the Lord and in the strength of his might.
11 Put on the whole armor of God, that you may be able to stand against the wiles of the devil.