He was referring to Judas, Simon Iscariot's son, for he was going to betray Him, although he was one of the Twelve.

But Judas Iscariot, one of His disciples, who was going to betray Him, said,

So Jesus, while supper was on -- although He knew that the devil had suggested to Judas Iscariot, Simon's son, to betray Him --

Jesus answered, "It is that one to whom I give the piece of bread when I dip it in the dish." So He dipped it into the dish and took it and gave it to Judas, Simon Iscariot's son.

As soon as he took the bread, Satan took possession of Judas. Then Jesus said to him, "Make quick work of what you are to do."

for some of them were thinking, as Judas had the purse, that Jesus meant to say to him, "Buy what we need for the feast," or to give something to the poor.

Judas (not Judas Iscariot) said to Him, "Why is it, Lord, that you are going to make yourself real to us and not to the world?"

Now Judas, too, who betrayed Him, knew the spot, because Jesus had often met with His disciples there.

So Judas got together the Roman garrison and some attendants from the high priests and Pharisees, and went there with lanterns and torches and weapons.

They answered Him, "Jesus of Nazareth." He said to them, "I am He." And Judas who betrayed Him was standing among them.