'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 unto them, Verily I say unto you, That you who have followed me, in the regeneration when the Son of man shall sit on the throne of his glory, you 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 unto them,

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

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

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