'The Twelve' in the Bible

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

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

And Jesus going up to Jerusalem, took the twelve disciples apart in the way, and said to them,

Then one of the twelve, called Judas Iscariot, went to the chief priests,

Now when the evening was come, he sat down with the twelve.

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