Jesus was betrayed in the Garden of Gethsemane by Judas Iscariot, who used a kiss to identify Jesus to the arresting soldiers. Judas was one of the 12 original disciples who had traveled with Jesus and assisted him for several years.
Greed is thought to be a key motive for the betrayal. The book of John describes Judas as a thief with greed in his heart and says he was paid 30 pieces of silver for his role in handing Jesus over to authorities. However, according to the book of Matthew, Judas later felt remorse for his actions and returned the money. Shortly after this, Judas committed suicide by hanging himself.
According to the book of John, Jesus foresaw that one of his apostles would betray him and signified that it would be Judas by giving him a piece of bread at the Last Supper.