Acts of the Apostles 19: 13-17 Then some itinerant Jewish exorcists tried to invoke the Name of the LORD Jesus over those with evil spirits, saying, “I adjure you by the Jesus whom Paul preaches.” When the seven sons of Sceva, a Jewish high priest, tried to do this, the evil spirit said to them in reply, “Jesus i recognize, Paul i know, but who are you?” The person with the evil spirit then sprang at them and subdued them all. He so overpowered them that they fled naked and wounded from that house. When this became known to all the Jews and Greeks who lived in Ephesus, fear fell upon them all, and the Name of the LORD Jesus was held in great esteem.
An explanation of this passage is as follows: Some Jewish men would travel about the towns and try to drive out evil spirits from the people in order to make a living. As they were Jews, they were not yet been baptized into Christianity and had no solid convictions about Christ. So there were seven sons of a Jewish high priest that were going about Ephesus trying to drive out demons. Because they saw how successful Paul was in driving out demons in the Name of Jesus, they too tried His holy Name. A demon was allowed to question the Jewish exorcists about using the holy Name, and then consequently lashed out at them, wounded them and scared them. The men fled the place where they were staying and realized the power of the Name of Jesus. His Name is not meant to be trifled with, It has a glorious power that is holy and may not be profaned.