Luke chapter 22 beginning the first verse:
Now the feast of unleavened bread drew nigh, which is called the Passover.
And the chief priests and scribes sought how they might kill him; for they feared the people.
Then entered Satan into Judas surnamed Iscariot, being of the number of the twelve.
And he went his way, and communed with the chief priests and captains, how he might betray him unto them.
And they were glad, and covenanted to give him money.
And he promised, and sought opportunity to betray him unto them in the absence of the multitude.
Here the Clerk of Oxford gives us a Middle English poem in which Judas has an excuse (of sorts) for his betrayal.