Powerful chapter in bible that assurance of god to remove the devil in you

The most powerful and direct chapter regarding God's assurance against the devil is James 4:7, which says, "Submit yourselves, then, to God. Resist the devil, and he will flee from you". This verse promises that when a person actively submits their life to God and resists the devil's temptations, the devil will have to retreat. Other supporting verses emphasize God's power, deliverance, and protection against evil spiritual forces. 

James 4:7: This is the most direct and frequently cited verse for this topic. It requires a two-part action from the believer: first, submit to God's authority, and second, resist the devil's attempts to lead you astray. The promise is that by doing these two things, the devil will flee, as his authority is subservient to God's.

Colossians 1:13: This verse provides assurance by reminding believers that God has already delivered them from the domain of darkness and transferred them to the kingdom of His Son.

Psalm 121:7-8: This passage offers a promise of divine protection, stating, "The LORD shall preserve you from all evil. He shall preserve your soul... from this time forth and even for evermore".

Mark 16:17: This verse speaks to the authority given to believers. It says, "in my name they will cast out demons," indicating that power is given through faith in Christ's name.

2 Corinthians 12:9-10: This passage points to a different kind of power, where God's strength is perfected in weakness. It suggests that when you feel weak and turn to Him, His power can then be demonstrated through you.