21Howbeit this kind goeth not out but by prayer and fasting.

23And when they had ordained them elders in every church, and had prayed with fasting, they commended them to the Lord, on whom they believed.

5Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.