Jesus predicted that one of them would betray him to his enemies.

John 13:18-30

18 “I am not saying that God will bless all of you. I knew what all of you were like when I chose you. But I also chose the one who will betray me, in order that what is written in Scripture might be fulfilled {to fulfill what someone/the psalmist wrote in Scripture}, ‘The one who is acting like he is my friend by eating with me has become my enemy [IDM].’

19 I am telling you about someone betraying me before it happens, in order that when it happens, you may continue to believe that I am ◄the Messiah/who I say I am►. 20 Listen to this carefully: Those who accept any one of you whom I am sending out, God will consider that they are accepting me. And those who accept me, God will consider that they are accepting my Father, who sent me.”

21 After Jesus said this, he was very troubled. He solemnly declared, “Listen to this carefully: One of you is going to enable my enemies to seize me.” 22 We looked at each other. We had no way to know whom he was talking about. 23 I, the man other people call ‘the one Jesus loved’, was sitting very close to Jesus. 24 Simon Peter motioned to me to indicate that I should ask Jesus whom he was talking about. 25 So I leaned close to Jesus and asked him, “Lord, who is it?” 26 Jesus answered, “It is the one to whom I will give this piece of bread after I dip it in the sauce in the dish.” Then, to show us that he knew who would enable his enemies to seize him, after he dipped the bread in the sauce, he gave it to Judas Iscariot (OR, Judas, the man from Kerioth Town). 27 As soon as Judas ate the bread, Satan took control of him. Then Jesus said to him, “What you are going to do, do quickly.” 28 But none of the rest of us who were sitting there knew why Jesus said that to him. 29 Since Judas took care of the money people gave us to help us, some thought Jesus was telling him to go and buy some things we needed for the Passover celebration. Some thought he was telling him to give some money to poor people. 30 As soon as Judas had eaten the bread, he left. It was dark outside, and it was dark [MET] in his soul, too.