Ephesians 6:10, 12-18

Finally, be strong in the Lord, and in the strength of his might.

For our wrestling is not against flesh and blood, but against the principalities, against the powers, against the world-rulers of this darkness, against the spiritual hosts of wickedness in the heavenly places. Wherefore take up the whole armor of God, that ye may be able to withstand in the evil day, and, having done all, to stand. Stand therefore, having girded your loins with truth, and having put on the breastplate of righteousness, and having shod your feet with the preparation of the gospel of peace; withal taking up the shield of faith, wherewith ye shall be able to quench all the fiery darts of the evil one. And take the helmet of salvation, and the sword of the Spirit, which is the word of God: with all prayer and supplication praying at all seasons in the Spirit, and watching thereunto in all perseverance and supplication for all the saints