Ashtu malku ta dat arkata
Sastus seckz altamu partu
Iretempal krez ta felta
Vaskalla regent met senturus
Ta sastrus estos melta
Kelta, kelta, kelta hine.
This is from the KoF.
I only say it - with a tone of authority - once. And it will do fine for banishing Pazuzu and just about most spirits. You might find the spirits of the Dead aren’t so respectful.
Say it once before you evoke to clear the ritual space of spirits who are not meant to be there, and then once afterwards to banish.