Murdock(i)
16 And I brought him to thy disciples, and they could not heal him.
17 Jesus answered and said: O unbelieving and perverse generation! How long shall I be with you? and how long bear with you? Bring him here to me.
18 And Jesus rebuked the demon, and it departed from him: and from that hour the child was healed.
19 Then came the disciples to Jesus, apart, and said to him: Why could not we heal him?
20 Jesus said to them: Because of your unbelief. For verily I say to you, That if there be in you faith like a grain of mustard seed, ye may say to this mountain, Remove hence, and it will remove: and nothing will be too hard for you.
21 But this kind goeth not out, except by fasting and prayer.