John sees that one of the beast’s seven heads had a wound serious enough to have caused its death. As it is, however, the beast was not dead; it had survived this mortal wound and the wound had healed
Here is a spoof on Jesus’ mortal wound on the cross. The Lamb of Revelation 5:6 was standing, as though it had been slain.
John could see the slit throat recalling Jesus’ suffering and death on the cross, yet the Lamb was standing, which recalls his resurrection from the dead. The resurrection of the murdered Jesus was certainly reason for the folk of Jerusalem to be in anguish for their sins (Acts 2:37) and reason aplenty to repent – and many did. That the beast also had what it took to survive a mortal wound is intended to communicate that the beast is every bit as impressive as Jesus Christ. More, the fact that its one head seemed
to have a mortal wound is intended to make the reader question whether Jesus’ wounds/death were only apparent (as opposed to real).
3 One of its heads seemed to have a mortal wound, but its mortal wound was healed, and the whole earth marveled as they followed the beast.