Charles Ellicott Commentary Mark 9:25

"And when Jesus saw that a multitude came running together, he rebuked the unclean spirit, saying unto him, Thou dumb and deaf spirit, I command thee, come out of him, and enter no more into him." — Mark 9:25 (ASV)

When Jesus saw that the people came running together.—This fact and the words of the rebuke to the “deaf and dumb spirit” are found only in Mark.

Enter no more into him.—We may note in these words, used by our Lord in this case only, a tender adaptation to the weak faith of the father. He had seen so many relapses, the last state worse than the first, that it was hard for him to take in the thought that the cure would be complete and permanent.