Mark 9:28

28 (9-27) And when he was come into the house, his disciples secretly asked him: Why could not we cast him out?

Mark 9:28 Meaning and Commentary

Mark 9:28

And when he was come into the house
Perhaps into the man's house whose child he had healed, or into some other in these parts, for the sake both of retirement and refreshment:

his disciples asked him privately, why could not we cast him out?
The nine disciples, who were particularly concerned in this matter, fearing they had lost the power of casting out devils, conferred upon them, inquired of Jesus, when he was alone, why they could not cast the demon out of the child, when they had ejected unclean spirits out of many others; (See Gill on Matthew 17:19).

Mark 9:28 In-Context

26 (9-25) And crying out and greatly tearing him, he went our of him. And he became as dead, so that many said: He is dead.

27 (9-26) But Jesus taking him by the hand, lifted him up. And he arose.

28 (9-27) And when he was come into the house, his disciples secretly asked him: Why could not we cast him out?

29 (9-28) And he said to them: This kind can go out by nothing, but by prayer and fasting.

30 (9-29) And departing from thence, they passed through Galilee: and he would not that any man should know it.