'The Twelve' in the Bible

Now these are the names of the twelve apostles: first, Simon (called Peter), and Andrew his brother; James son of Zebedee and John his brother;

Jesus said to them, "I tell you the truth: In the age when all things are renewed, 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.

As Jesus was going up to Jerusalem, he took the twelve aside privately and said to them on the way,

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

When it was evening, he took his place at the table with the twelve.

While he was still speaking, Judas, one of the twelve, arrived. With him was a large crowd armed with swords and clubs, sent by the chief priests and elders of the people.