Exorcism
In Catholic practice the person performing the exorcism, known as an exorcist, is an ordained priest. The exorcist recites prayers according to the rubrics of the rite, and may make use of religious materials such as icons and sacramentals. The exorcist invokes God—specifically the Name of Jesus—as well as members of the Church Triumphant and the Archangel Michael to intervene with the exorcism. According to Catholic understanding, several weekly exorcisms over many years are sometimes required to expel a deeply entrenched demon.
Exorcist
These exorcists routinely performed ceremonies over adults and infants preparing to be baptised. Authors such as Eusebius (3rd century) and Augustine (4th century) provide details of these minor exorcisms: Eusebius mentions the imposition of hands and prayer. Augustine noted that rites of exorcism by exsufflation (breathing upon the candidate) were also performed for the baptism of infants.