'The Twelve' in the Bible

So Jesus said to the twelve [disciples], “You do not want to leave too, do you?”

Jesus answered them, “Did I not choose you, the twelve [disciples]? And yet one of you is a devil (ally of Satan).”

Now He was speaking of Judas, the son of Simon Iscariot; for he, one of the twelve [disciples], was about to betray Him.

Now he said this, not because he cared about the poor [for he had never cared about them], but because he was a thief; and since he had the money box [serving as treasurer for the twelve disciples], he used to pilfer what was put into it.

But Thomas, one of the twelve [disciples], who was called Didymus (the twin), was not with them when Jesus came.