Be subject therefore unto God; but resist the devil, and he will flee from you.
1 John 4: 4
Ye are of God, my little children, and have overcome them: because greater is he that is in you than he that is in the world.
Eph 6: 10 - 12
Finally, be strong in the Lord, and in the strength of his might. 11 Put on the whole armor of God, that ye may be able to stand against the wiles of the devil. 12 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.
1 Tim 6: 12
Fight the good fight of the faith, lay hold on the life eternal, whereunto thou wast called, and didst confess the good confession in the sight of many witnesses.
Eph 4: 27
Neither give place to the devil.
Mat 17: 19 - 21
Then came the disciples to Jesus apart, and said, Why could not we cast it out? 20 And he saith unto them, Because of your little faith: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.
2 Cor 10: 4, 5
(For the weapons of our warfare are not of the flesh, but mighty before God to the casting down of strongholds); 5 casting down imaginations, and every high thing that is exalted against the knowledge of God, and bringing every thought into captivity to the obedience of Christ;
1 Pet 5: 8, 9
Be sober, be watchful: your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: 9 whom withstand stedfast in your faith, knowing that the same sufferings are accomplished in your brethren who are in the world.
2 Tim 4: 18
The Lord will deliver me from every evil work, and will save me unto his heavenly kingdom: to whom be the glory for ever and ever. Amen.
1 John 3: 8 b
To this end was the Son of God manifested, that he might destroy the works of the devil.
Col 1: 13
Who delivered us out of the power of darkness, and translated us into the kingdom of the Son of his love;
Mark 9:29
And he said unto them, This kind can come out by nothing, save by prayer. (Some manuscripts add and fasting.)