Judas Iscariot
Judas Iscariot (died AD) was a disciple and one of the original Twelve Disciples of Jesus Christ. According to all four canonical gospels, Judas betrayed Jesus to the Sanhedrin in the Garden of Gethsemane by kissing him and addressing him as "Rabbi" to reveal his identity to the crowd who had come to arrest him. His name is often used synonymously with betrayal or treason. Judas's epithet "Iscariot" most likely means he came from the village of Kerioth, but this explanation is not universally accepted and many other possibilities have been suggested.
Jesus Christ Superstar
Finally, Judas arrives with Roman soldiers and identifies Jesus by kissing him on the cheek ("The Arrest"). While Jesus is being arrested, his apostles attempt to fight the soldiers, Jesus tells them to let the soldiers take him to Caiaphas. On the way, a mob (acting like—and sometimes represented as—modern-day news reporters) asks Jesus what he plans to do, but Jesus declines to comment. When Jesus is brought to trial before the Sanhedrin, Caiaphas demands if he is the King of the Jews. Jesus responds: "That's what you say, you say that I am." This answer is affirmative according to Jewish custom, and that provides enough justification for the Pharisees to bring Jesus to Pilate. Meanwhile, Jesus's apostle Peter is confronted by an old man, a soldier and a maid, and Peter denies to each that he knows Jesus ("Peter's Denial"). Mary asks Peter why he denied Jesus, and Peter responds that he had to do it in order to save himself. Mary wonders how Jesus knew that Peter would deny him three times.