Matthew Poole and continuators on Acts 19:16

16 And the man in whom the evil spirit was, leapt on them, and overcame them, and prevailed against them, so that they fled out of that house naked and wounded.

By the power of the evil spirit, which by the permission of God did act in him, Matth. 8.28. Mark 5.4. Luke 8.29. Satan retains still his natural power, tho he hath wholly lost his moral or spiritual power unto any good: and that his violence proceeded no further, is to be ascribed only to the bounds which God had set him; which he, being in Chains, could not exceed or go beyond; not for his want of malice, but power.