Mark 3:14-19

And He appointed twelve [disciples], so that they would be with Him [for instruction] and so that He could send them out to preach [the gospel as apostles—that is, as His special messengers, personally chosen representatives], and to have authority and power to cast out demons. He appointed the twelve: Simon (to whom He gave the name Peter), [Matt 10:2-4; Luke 6:13-16] and James, the son of Zebedee, and John the brother of James (to them He gave the name Boanerges, that is, “Sons of Thunder”); and [He also appointed] Andrew, and Philip, and Bartholomew (Nathanael), and Matthew (Levi the tax collector), and Thomas, and James the son of Alphaeus, and Thaddaeus (Judas the son of James), and Simon the Zealot; and Judas Iscariot, who betrayed Him.