'The Twelve' in the Bible

Jesus said therefore to the twelve, "You do not also want to go away, do you?"

Jesus answered them, "Did not I choose you, the twelve, and one of you is a devil?"

Now he spoke of Judas, the son of Simon Iscariot, for it was he who would betray him, being one of the twelve.

But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.