Mark 9:29

And he said to them, This kind can go out by nothing, except by prayer.

Matthew 12:45

Then it goeth and taketh with it seven other spirits more wicked than itself, and they enter in, and dwell there; and the last state of that man becometh worse than the first. So will it be also with this wicked generation.

Matthew 17:20

And he said to them, Because of your want of faith. For truly do I say to you, If ye have faith as a grain of mustard, ye shall say to this mountain, Remove hence to yonder place, and it will remove; and nothing will be impossible to you.

Luke 11:26

Then it goeth, and taketh with it seven other spirits more wicked than itself, and they enter in, and dwell there; and the last state of that man becometh worse than the first.

Acts 9:40-41

But Peter put them all forth, and kneeled down and prayed; and turning to the body he said, Tabitha, arise. And she opened her eyes; and seeing Peter, she sat up.

Acts 14:23

And having appointed for them elders in every church, they prayed with fasting, and commended them to the Lord, in whom they believed.

1 Corinthians 9:27

but I beat down my body, and bring it into subjection, lest perhaps, when I have been a herald to others, I should myself be rejected as unworthy.

2 Corinthians 6:5

in stripes, in imprisonments, in tumults, in labors, in watchings, in fastings;

2 Corinthians 11:27

by weariness and painfulness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.

2 Corinthians 12:8

In respect to this I besought the Lord thrice, that it might depart from me;

Ephesians 6:18

praying with all prayer and entreaty at all times in the Spirit; and watching to this end with all perseverance and entreaty for all the saints,

James 5:15

And the prayer of faith will save the sick, and the Lord will raise him up; even if he have committed sins, it shall be forgiven him.

Treasury of Scripture Knowledge

Summary

And he said unto them, This kind can come forth by nothing, but by prayer and fasting.

Bible References

This

Matthew 12:45
Then it goeth and taketh with it seven other spirits more wicked than itself, and they enter in, and dwell there; and the last state of that man becometh worse than the first. So will it be also with this wicked generation.
Luke 11:26
Then it goeth, and taketh with it seven other spirits more wicked than itself, and they enter in, and dwell there; and the last state of that man becometh worse than the first.

By prayer

Acts 9:40
But Peter put them all forth, and kneeled down and prayed; and turning to the body he said, Tabitha, arise. And she opened her eyes; and seeing Peter, she sat up.
2 Corinthians 12:8
In respect to this I besought the Lord thrice, that it might depart from me;
Ephesians 6:18
praying with all prayer and entreaty at all times in the Spirit; and watching to this end with all perseverance and entreaty for all the saints,
James 5:15
And the prayer of faith will save the sick, and the Lord will raise him up; even if he have committed sins, it shall be forgiven him.

Fasting

Acts 14:23
And having appointed for them elders in every church, they prayed with fasting, and commended them to the Lord, in whom they believed.
1 Corinthians 9:27
but I beat down my body, and bring it into subjection, lest perhaps, when I have been a herald to others, I should myself be rejected as unworthy.
2 Corinthians 6:5
in stripes, in imprisonments, in tumults, in labors, in watchings, in fastings;
2 Corinthians 11:27
by weariness and painfulness, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness.