This obviously wasn't the full-fledged major exorcism, but could have been an exorcism prayer. There are several that are part of the ritual - one that is very ancient, called "St. Anthony's Brief":
Ecce Crucem Domini
Fugite, partes adversae
Vicit Leo de Tribu Juda
Radix Jesse, Alleluia
Behold the Cross of the Lord!
Flee, hostile powers!
The Lion of the Tribe of Judah,
The Root of Jesse, has conquered, Alleluia.
(you can use that one yourself in times of need)
Behold the Cross of the Lord!
Flee, hostile powers!
The Lion of the Tribe of Judah,
The Root of Jesse, has conquered, Alleluia.