Mark

Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.

And when it was day, he called unto him his disciples: and of them he chose twelve, whom also he named apostles;

Simon the Canaanite, and Judas Iscariot, who also betrayed him.

And when they were come in, they went up into an upper room, where abode both Peter, and James, and John, and Andrew, Philip, and Thomas, Bartholomew, and Matthew, James the son of Alpheus, and Simon Zelotes, and Judas the brother of James.

But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him.