Mark 9:29

And He said unto them, This kind cannot be cast out, but by prayer and fasting.

Matthew 12:45

then he goeth and taketh with him seven other spirits more wicked than himself, and they enter in and dwell there; and so the last state of that man is worse than the first. And thus shall it be to this wicked generation.

Matthew 17:20

And Jesus said unto them, because of your unbelief: for verily I tell you, if ye had but faith as a grain of mustard-seed, ye might say to this mountain, Remove from hence thither, and it shall remove: and nothing would be impossible to you.

Luke 11:26

Then he goeth and taketh with him seven other spirits more wicked than himself, and they enter in and dwell there: and so the last state of that man is worse than the first.

Acts 9:40-41

But Peter, putting them all out, kneeled down and prayed: and then turning to the body he said, Tabitha, arise. And she opened her eyes, and when she saw Peter, she sat up.

Acts 14:23

And when they had appointed them elders in every church, praying and fasting, they recommended them to the Lord, in whom they had believed.

1 Corinthians 9:27

but I mortify my body and bring it into subjection, least after having preached to others, I myself should be rejected.

2 Corinthians 6:5

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

2 Corinthians 11:27

in labor and toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness: and beside these outward troubles,

2 Corinthians 12:8

For this I besought the Lord thrice, that it might depart from me.

Ephesians 6:18

praying at all seasons with all prayer and supplication in the Spirit, and watching thereunto with all perseverance, and intercession for all the saints;

James 5:15

and the prayer of faith shall save the sick, and the Lord will raise him up; and if he have committed sins, they 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 he goeth and taketh with him seven other spirits more wicked than himself, and they enter in and dwell there; and so the last state of that man is worse than the first. And thus shall it be to this wicked generation.
Luke 11:26
Then he goeth and taketh with him seven other spirits more wicked than himself, and they enter in and dwell there: and so the last state of that man is worse than the first.

By prayer

Matthew 17:21
But this kind is not to be cast out but by prayer and fasting.
Acts 9:40
But Peter, putting them all out, kneeled down and prayed: and then turning to the body he said, Tabitha, arise. And she opened her eyes, and when she saw Peter, she sat up.
2 Corinthians 12:8
For this I besought the Lord thrice, that it might depart from me.
Ephesians 6:18
praying at all seasons with all prayer and supplication in the Spirit, and watching thereunto with all perseverance, and intercession for all the saints;
James 5:15
and the prayer of faith shall save the sick, and the Lord will raise him up; and if he have committed sins, they shall be forgiven him.

Fasting

Acts 14:23
And when they had appointed them elders in every church, praying and fasting, they recommended them to the Lord, in whom they had believed.
1 Corinthians 9:27
but I mortify my body and bring it into subjection, least after having preached to others, I myself should be rejected.
2 Corinthians 6:5
in stripes, in imprisonments, in tumults, in labors, in watchings, in fastings;
2 Corinthians 11:27
in labor and toil, in watchings often, in hunger and thirst, in fastings often, in cold and nakedness: and beside these outward troubles,