Mark 14:10-12

10And Judas Iscariote, one of the twelve, went away to the chief priests that he might deliver him up to them;

11and they, when they heard it, rejoiced, and promised him to give money. And he sought how he could opportunely deliver him up.

12And the first day of unleavened bread, when they slew the passover, his disciples say to him, Where wilt thou that we go and prepare, that thou mayest eat the passover?