May the forces of evil become confused on the way to your house.

George Carlin (1937-2008) American comedian

Show (1986-05-02), “Hello-Goodbye,” Playin’ With Your Head, Beverly Theatre, Los Angeles (HBO)

Explained in the routine as part of a series of rotating "good-bye" phrases he uses.

(Source (Video)). Routine collected in Napalm & Silly Putty (2001).