John 6:67-71

So Jesus said to the twelve [disciples], “You do not want to leave too, do you?” Simon Peter answered, “Lord, to whom shall we go? You [alone] have the words of eternal life [you are our only hope]. We have believed and confidently trusted, and [even more] we have come to know [by personal observation and experience] that You are the Holy One of God [the Christ, the Son of the living God].” Jesus answered them, “Did I not choose you, the twelve [disciples]? And yet one of you is a devil (ally of Satan).” Now He was speaking of Judas, the son of Simon Iscariot; for he, one of the twelve [disciples], was about to betray Him.