Luke 6:12-16 (NIV) The Twelve Apostles
12 One of those days Jesus went out to a mountainside to pray, and spent the night praying to God. 13 When morning came, he called his disciples to him and chose twelve of them, whom he also designated apostles: 14 Simon (whom he named Peter), his brother Andrew, James, John, Philip, Bartholomew, 15 Matthew, Thomas, James son of Alphaeus, Simon who was called the Zealot, 16 Judas son of James, and Judas Iscariot, who became a traitor.
1 Peter 5:8 (NIV)
8 Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour.