Luke 22:2-6, 47-48

And the chief priests and the scribes sought how they might put him to death; for they feared the people. And Satan entered into Judas who was called Iscariot, being of the number of the twelve. And he went away, and communed with the chief priests and captains, how he might deliver him unto them. And they were glad, and covenanted to give him money. And he consented, and sought opportunity to deliver him unto them in the absence of the multitude.

While he yet spake, behold, a multitude, and he that was called Judas, one of the twelve, went before them; and he drew near unto Jesus to kiss him. But Jesus said unto him, Judas, betrayest thou the Son of man with a kiss?