The Gospel of Judas 35
2Judas [said] to him, "I know who you are and where you've come from. You've come from the immortal realm of Barbelo, and I'm not worthy to utter the name of the one who's sent you."
3Then Jesus, knowing that he was thinking about what's exalted, said to him, "Come away from the others and I'll tell you the mysteries of the kingdom. Not so that you'll go there, but you'll grieve much because someone else will replace you to complete the twelve [elements] before their God."
See also: Acts 1:26