Matthew 17:18-20

18Yeshua rebuked the demon and it came out of him, and the boy was healed from that very hour.

19Then the disciples came to Yeshua in private and said, “Why couldn’t we drive it out?”

20And He said to them, “Because you trust so little. Amen, I tell you, if you have faith the size of a mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”