'The Twelve' in the Bible

So Jesus appealed to the Twelve. "You also do not wish to leave me, do you?"

In reply Jesus said to them. "Have I not chosen you, the Twelve? And yet even of you one is an enemy."

Now Jesus was speaking of Judas, the son of Simon Iscariot; for Judas was to betray him, although he was one of the Twelve.

But Thomas, one of the Twelve, who was called "The Twin." was not with them when Jesus came.