Ephesians 6:10-11

Finally, be strong in the Lord and in his mighty power. Put on the full armor of God so that you can take your stand against the devil's schemes.

be strong in the Lord
2 Samuel 10:12 "Be strong and let us fight bravely for our people and the cities of our God. The LORD will do what is good in his sight."
Psalm 27:14 Wait for the LORD; be strong and take heart and wait for the LORD.
Haggai 2:4 "'But now be strong, O Zerubbabel,' declares the LORD. 'Be strong, O Joshua son of Jehozadak, the high priest. Be strong, all you people of the land,' declares the LORD, 'and work. For I am with you,' declares the LORD Almighty."
1 Corinthians 16:13 Be on your guard; stand firm in the faith; be men of courage; be strong.
2 Timothy 2:1 You then, my son, be strong in the grace that is in Christ Jesus.

and in his mighty power
Ephesians 1:19-20 ... and his incomparably great power for us who believe. That power is like the working of his mighty strength, which he exerted in Christ when he raised him from the dead and seated him at his right hand in the heavenly realms, ...

Put on the full armor of God
Ephesians 6:13 Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand.
Romans 13:12 The night is nearly over; the day is almost here. So let us put aside the deeds of darkness and put on the armor of light.
1 Thessalonians 5:8 But since we belong to the day, let us be self-controlled, putting on faith and love as a breastplate, and the hope of salvation as a helmet.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.