John 6:66-71

After this, many of his disciples left. They no longer wanted to be associated with him. Then Jesus gave the Twelve their chance: “Do you also want to leave?” Peter replied, “Master, to whom would we go? You have the words of real life, eternal life. We’ve already committed ourselves, confident that you are the Holy One of God.” Jesus responded, “Haven’t I handpicked you, the Twelve? Still, one of you is a devil!” He was referring to Judas, son of Simon Iscariot. This man—one from the Twelve!—was even then getting ready to betray him.