Matthew 17:14-18

14And when they were come to the multitude, there came to him a man, kneeling to him, and saying, 15Lord, have mercy on my son: for he is epileptic, and suffereth grievously; for oft-times he falleth into the fire, and oft-times into the water. 16And I brought him to thy disciples, and they could not cure him. 17And Jesus answered and said, O faithless and perverse generation, how long shall I be with you? how long shall I bear with you? bring him hither to me. 18And Jesus rebuked him; and the demon went out of him: and the boy was cured from that hour.