Mark 9
Young's Literal Translation (YLT)
28 Ref And he having come into the house, his disciples were questioning him by himself -- `Why were we not able to cast it forth?'
29 Ref And he said to them, `This kind is able to come forth with nothing except with prayer and fasting.'
30 Ref And having gone forth thence, they were passing through Galilee, and he did not wish that any may know,