Mark 3:19
and Judas Iscariot, who also betrayed him. And they came into a house,
Matthew 26:14-16
Then went one of the twelve called Judas Iscariot to the chief priests,
Matthew 26:47
And while he was yet speaking, behold, Judas, one of the twelve, came, and with him a great multitude, with swords and clubs, from the chief priests and elders of the people.
Matthew 27:3-5
Then Judas, who betrayed him, seeing that he was condemned, repenting, returned the thirty shekels of silver [$16.80] to the chief priests and elders,
John 6:64
But there are some of you who believe not. For Jesus knew from the beginning who they were that believed not, and who he was that would betray him.
John 6:71
But he spoke of Judas the son of Simon Iscariot, for he was about to betray him, being one of the twelve.
John 12:4-6
But the Iscariot, one of his disciples, who was about to betray him, said,
John 13:2
And supper being over, the devil having already put it in the heart that Judas Iscariot, the son of Simon, should betray him,
John 13:26-30
Then Jesus answered, It is he to whom I will dip and give the mouthful. Then dipping the mouthful, he took and gave it to Judas, the son of Simon Iscariot.