Second Epistle of John
The letter also warns against people who say that Jesus was not a flesh-and-blood figure: "For many deceivers are entered into the world, who say that Jesus Christ has not come in the flesh." This shows that, from the time the epistle was first written, there were those who had docetic ideas about Jesus, believing that the human person of Jesus was really a pure spirit or did not come at all. John says that these people are deceivers and even calls them Antichrist that is against Christ. He says Christians should not receive such people.