In Revelations chapter 13 verses 16 and 17 it says:
“And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads: And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.”
While there has been much speculation as to whether or not this prophecy of the last days has already come to pass with the use of UPC codes, I believe all prophecies will be fulfilled quite literally as they have so many times thus far. I recently found myself exploring a question in consideration of this prophesy as well as the substantial information available about the reality of RFID chips