'The Twelve' in the Bible

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;

Jesus said to them, "Truly I say to you, at the renewal of all things, when the Son of Man sits on his glorious throne, you who have followed me will also sit on twelve thrones, judging the twelve tribes of Israel.

Now as Jesus was going up to Jerusalem, he took the twelve disciples aside, and on the way he said to them,

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

When evening had come, he sat at the table with the twelve.

While he was still speaking, Judas came, one of the twelve, and with him a great crowd with swords and clubs, from the chief priests and the elders of the people.