It may be helpful to add extra information. Alternate translation: "Jesus was driving a demon out of a person" or "Jesus was making a demon leave a person" (See: [[rc://en/ta/man/translate/figs-ellipsis]])
The demon has power to prevent people from speaking. Alternate translation: "demon that caused the man to be unable to speak" (See: [[rc://en/ta/man/translate/figs-explicit]])
This word is used here to mark where the action starts. If your language has a way for doing this, you could consider using it here. When the demon comes out of the man, some of the people criticize Jesus, and that leads to Jesus teaching about evil spirits.
It may be helpful to add extra information. Alternate translation: "When the demon had gone out of the man" or "When the demon left the man" (See: [[rc://en/ta/man/translate/figs-ellipsis]])