Judas, who betrays Christ is shown ugly and in shadow, clutching the bag of money he was paid to betray Christ to the Romans. This is a study for the figure of Judas.

This story is sometimes also called The Kiss of Judas.

Here is the passage from the book of Matthew, chapter 26, verses 47-52:

47 While he was still speaking, Judas, one of the Twelve, arrived. With him was a large crowd armed with swords and clubs, sent from the chief priests and the elders of the people.
48 Now the betrayer had arranged a signal with them: "The one I kiss is the man; arrest him."
49 Going at once to Jesus, Judas said, "Greetings, Rabbi!" and kissed him.
50 Jesus replied, "Friend, do what you came for."[4] Then the men stepped forward, seized Jesus and arrested him.
51 With that, one of Jesus' companions reached for his sword, drew it out and struck the servant of the high priest, cutting off his ear.
52 "Put your sword back in its place," Jesus said to him, "for all who draw the sword will die by the sword.

And here is the story as told by Mark, chapter 14, verses 43-47:

43 Just as he was speaking, Judas, one of the Twelve, appeared. With him was a crowd armed with swords and clubs, sent from the chief priests, the teachers of the law, and the elders.
44 Now the betrayer had arranged a signal with them: "The one I kiss is the man; arrest him and lead him away under guard."
45 Going at once to Jesus, Judas said, "Rabbi!" and kissed him.
46 The men seized Jesus and arrested him.
47 Then one of those standing near drew his sword and struck the servant of the high priest, cutting off his ear.

And here is the story as told by Luke, chapter 22, verses 47-51:

47 While he was still speaking a crowd came up, and the man who was called Judas, one of the Twelve, was leading them. He approached Jesus to kiss him,
48 but Jesus asked him, "Judas, are you betraying the Son of Man with a kiss?"
49 When Jesus' followers saw what was going to happen, they said, "Lord, should we strike with our swords?"
50 And one of them struck the servant of the high priest, cutting off his right ear.
51 But Jesus answered, "No more of this!" And he touched the man's ear and healed him.

And here is John, chapter 18, verses 2-11:

2 Now Judas, who betrayed him, knew the place, because Jesus had often met there with his disciples.
3 So Judas came to the grove, guiding a detachment of soldiers and some officials from the chief priests and Pharisees. They were carrying torches, lanterns and weapons.
4 Jesus, knowing all that was going to happen to him, went out and asked them, "Who is it you want?"
5 "Jesus of Nazareth," they replied. "I am he," Jesus said. (And Judas the traitor was standing there with them.)
6 When Jesus said, "I am he," they drew back and fell to the ground.
7 Again he asked them, "Who is it you want?" And they said, "Jesus of Nazareth."
8 "I told you that I am he," Jesus answered. "If you are looking for me, then let these men go."
9 This happened so that the words he had spoken would be fulfilled: "I have not lost one of those you gave me."
10 Then Simon Peter, who had a sword, drew it and struck the high priest's servant, cutting off his right ear. (The servant's name was Malchus.)
11 Jesus commanded Peter, "Put your sword away! Shall I not drink the cup the Father has given me?"