Matthew 17:19-20

Sawyer(i) 19 Then the disciples came to Jesus privately, and said, Why could we not cast it out? 20 And Jesus said to them, On account of your unbelief. For I tell you truly, if you have a faith like a mustard seed, you shall say to this mountain, Be removed thence to that place, and it shall be removed; and nothing shall be impossible to you.