Mark 9:17

9:17 A member of the crowd said to him, “Teacher, I brought you my son, who is possessed by a spirit that makes him mute.

Mark 9:25

9:25 Now when Jesus saw that a crowd was quickly gathering, he rebuked ¹  the unclean spirit, ²  saying to it, “Mute and deaf spirit, I command you, come out of him and never enter him again.”

[9:25]  ¹ tn Or “commanded” (often with the implication of a threat, L&N 33.331).

[9:25]  ² sn Unclean spirit refers to an evil spirit.