Mark 9:29

And he said unto them - This kind, by nothing, can come out, save, by prayer.

1 Kings 17:20-21

Then cried he unto Yahweh, and said, - O Yahweh, my God! Even upon the widow with whom I am sojourning, hast thou brought misfortune by causing the death of her son?

Daniel 9:3

So I set my face unto the Lord God, to seek him by prayer, and supplication, - with fasting, and sackcloth and ashes;

Matthew 12:45

Then, it goeth, and taketh along with itself, seven diverse spirits, more wicked than itself, - and, entering, abideth there; and, the last state of that man, becometh, worse than the first. So, shall it be, with this, wicked, generation.

Acts 13:2-3

And, as they were publicly ministering unto the Lord and fasting, the Holy Spirit said - Separate forthwith unto me, Barnabas and Saul, unto the work whereunto I have called them.

Acts 14:23

Moreover, appointing unto them by vote, in each assembly, elders, praying with fastings, they commended them unto the Lord on whom they had believed.

1 Corinthians 7:5

Be not depriving one another - unless perhaps by consent for a season, that ye may have leisure for prayer, and, again, may be together, - lest Satan be tempting you by reason of your want of self-control.

2 Corinthians 11:27

in toil and hardship, in watchings, oft, in hunger and thirst, in fasting, oft, in cold and nakedness: -

Ephesians 6:18

With all prayer and supplication, praying in every season, in spirit, and, thereunto, watching, with all perseverance and supplication, for all the saints, -

Treasury of Scripture Knowledge

Summary

Howbeit this kind goeth not out but by prayer and fasting.

Bible References

This

Matthew 12:45
Then, it goeth, and taketh along with itself, seven diverse spirits, more wicked than itself, - and, entering, abideth there; and, the last state of that man, becometh, worse than the first. So, shall it be, with this, wicked, generation.

But

1 Kings 17:20
Then cried he unto Yahweh, and said, - O Yahweh, my God! Even upon the widow with whom I am sojourning, hast thou brought misfortune by causing the death of her son?
Daniel 9:3
So I set my face unto the Lord God, to seek him by prayer, and supplication, - with fasting, and sackcloth and ashes;
Mark 9:29
And he said unto them - This kind, by nothing, can come out, save, by prayer.
Acts 13:2
And, as they were publicly ministering unto the Lord and fasting, the Holy Spirit said - Separate forthwith unto me, Barnabas and Saul, unto the work whereunto I have called them.
Acts 14:23
Moreover, appointing unto them by vote, in each assembly, elders, praying with fastings, they commended them unto the Lord on whom they had believed.
1 Corinthians 7:5
Be not depriving one another - unless perhaps by consent for a season, that ye may have leisure for prayer, and, again, may be together, - lest Satan be tempting you by reason of your want of self-control.
2 Corinthians 11:27
in toil and hardship, in watchings, oft, in hunger and thirst, in fasting, oft, in cold and nakedness: -
Ephesians 6:18
With all prayer and supplication, praying in every season, in spirit, and, thereunto, watching, with all perseverance and supplication, for all the saints, -