“Then certain of the vagabond Jews, exorcists, took upon them to call over them which had evil spirits the name of the Lord Jesus, saying, We adjure you by Jesus whom Paul preacheth.”
King James Version (KJV)
19:13 Exorcists - Several of the Jews about this time pretended to a power of casting out devils, particularly by certain arts or charms, supposed to be derived from Solomon. Undertook to name - Vain undertaking! Satan laughs at all those who attempt to expel him either out of the bodies or the souls of men but by Divine faith. All the light of reason is nothing to the craft or strength of that subtle spirit. His craft cannot be known but by the Spirit of God nor can his strength be conquered but by the power of faith.
Ac 19:13 Then certain of the vagabond Jews, exorcists. Our Lord refers to these Jewish exorcists in Mt 12:27. Josephus ("Antiq". 8:2,5) declares that certain Jews claimed to expel demons. He says that their knowledge of the art was derived from Solomon. These, witnessing the wonderful power of the name of Christ, thinking it a sort of incantation, took it upon themselves to use it instead of their usual formula.