'The Twelve' in the Bible

Now the names of the twelve apostles are these: First, Simon, who is called Peter, and Andrew his brother, James the son of Zebedee, and John his brother,

And Jesus said to them, Truly I say to you, that ye who have followed me, in the regeneration when the Son of man will sit on the throne of his glory, ye also will sit upon twelve thrones, judging the twelve tribes of Israel.

And while going up to Jerusalem, Jesus took the twelve disciples in private on the way, and he said to them,

Then one of the twelve, who was called Judas Iscariot, having gone to the chief priests,

Now having become evening, he was sitting with the twelve.

And while he was still speaking, lo, Judas, one of the twelve, came, and with him a great multitude with swords and clubs from the chief priest and elders of the people.