Mark 1:23

1:23 Just then there was a man in their synagogue with an unclean spirit, and he cried out,

Mark 1:26

1:26 After throwing him into convulsions, the unclean spirit cried out with a loud voice and came out of him.

Mark 3:29

3:29 But whoever blasphemes against the Holy Spirit will never be forgiven, but is guilty of an eternal sin”

Mark 14:38

14:38 Stay awake and pray that you will not fall into temptation. The spirit is willing, but the flesh is weak.”