'The Twelve' in the Bible

Then Jesus said to the twelve, "Do you also want to go away?"

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

He spoke of Judas Iscariot, the son of Simon, for it was he who was to betray him, though one of the twelve.

Now Thomas, one of the twelve, called the Twin, was not with them when Jesus came.