Matthew 17:18-20

21st Century King James Version

¹⁸ And Jesus rebuked the devil, and he departed out of him, and the child was cured from that very hour.

¹⁹ Then came the disciples to Jesus apart and said, “Why could we not cast him out?”

²⁰ And Jesus said unto them, “Because of your unbelief; for verily I say unto you, if ye have faith as a grain of mustard seed, ye shall say unto this mountain, ‘Remove hence to yonder place,’ and it shall remove. And nothing shall be impossible unto you.