Hello, guys. How can I sent away a spirit in a respectful way after he’s done his job and u now longer want his pressence?
“Thank you and fare thee well/go in peace.”
As @Maulbeere said.
You would do it in the same way you would ask a guest to leave. I usually say something along the lines of, “Thank you for your work on my behalf. Depart now, to whence you came and may there always be peace between us.”