The Twelve Apostles.
v.1 Jesus called his twelve chosen men to be apostles and to heal all diseases and illnesses and to cast out unclean spirits. This is perhaps the initial solution to the “workers are few” comments in 9:35-38. This begins the second major discourse of Jesus in Matthew. The number twelve reminds us of the twelve tribes of Israel and indicates the continuity of God’s plan of salvation. Theses are the new leaders of Israel (under the Messiah) and they are commissioned to do miracles the old leaders cannot perform (scribes, Pharisees, Sadducees). Apostle means one sent with a special commission.
v.2-4 The names of the twelve are Simon (Peter), Andrew, James, John, Philip, Bartholomew, Thomas, Matthew, James son of Alphaeus, Thaddaeus, Simon the Zealot, and Judas Iscariot. For parallels see Mk 3:16-19, Lk 6:14-16, Jn 1:40-49, and Acts 1:13. The inner circle consisted of Peter, James and his brother John.

Read Matthew 10:1-4