Mark 9:29

Jesus answered, such a miracle is not effected but by prayer and fasting.

Matthew 12:45

then he goes and takes seven other spirits besides himself, but more mischievous than himself, and they all enter in and lodge there: so that the last state of that man is worse than the first. just so shall it likewise fare with this wicked generation.

Matthew 17:20

because of your incredulity, said Jesus: for I tell you truly, if ye had ever so little faith, ye might say to this mountain, remove hence to yonder place, and it should remove; and nothing would be too difficult for you.

Luke 11:26

then he goes and takes with him seven other spirits more wicked than himself: they all enter in and dwell there, and the last state of that man becomes worse than the first.

Acts 9:40-41

but Peter turn'd them all out, and kneeled down and prayed, then turning towards the body, Tabitha, said he, arise immediately. she opened her eyes: and when she saw Peter, she sat up.

Acts 14:23

and after they had by prayers and fastings establish'd Pastors for them in every church, 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: lest after having been a herald to others, I my self should be thrown out.

2 Corinthians 6:5

from imprisonments, from tumults, from labours, from watchings, from penury.

2 Corinthians 11:27

expos'd to toil, to fatigue, to frequent watchings, to hunger and thirst, to frequent fastings, to cold and penury.

2 Corinthians 12:8

I besought the Lord thrice, to make him leave me.

Ephesians 6:18

Pour out your souls unto God upon all occasions, watching in prayer with all perseverance and supplication for all christians:

James 5:15

the prayer that proceeds from faith, shall save the sick; the Lord will raise him up, and his sins that may have been the occasion, shall be forgiven.

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 goes and takes seven other spirits besides himself, but more mischievous than himself, and they all enter in and lodge there: so that the last state of that man is worse than the first. just so shall it likewise fare with this wicked generation.
Luke 11:26
then he goes and takes with him seven other spirits more wicked than himself: they all enter in and dwell there, and the last state of that man becomes worse than the first.

By prayer

Matthew 17:21
however, such a distemper is not to be removed but by prayer and fasting.
Acts 9:40
but Peter turn'd them all out, and kneeled down and prayed, then turning towards the body, Tabitha, said he, arise immediately. she opened her eyes: and when she saw Peter, she sat up.
2 Corinthians 12:8
I besought the Lord thrice, to make him leave me.
Ephesians 6:18
Pour out your souls unto God upon all occasions, watching in prayer with all perseverance and supplication for all christians:
James 5:15
the prayer that proceeds from faith, shall save the sick; the Lord will raise him up, and his sins that may have been the occasion, shall be forgiven.

Fasting

Acts 14:23
and after they had by prayers and fastings establish'd Pastors for them in every church, 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: lest after having been a herald to others, I my self should be thrown out.
2 Corinthians 6:5
from imprisonments, from tumults, from labours, from watchings, from penury.
2 Corinthians 11:27
expos'd to toil, to fatigue, to frequent watchings, to hunger and thirst, to frequent fastings, to cold and penury.