'Twelve' in the Bible

So they took them up: twelve baskets full of broken bits of the five cakes which were over after the people had had enough.

So Jesus said to the twelve, Have you a desire to go away?

Then Jesus said, Did I not make a selection of you, the twelve, and one of you is a son of the Evil One?

He was talking of Judas, the son of Simon Iscariot. It was he who was to be false to Jesus--one of the twelve.

Then Jesus said in answer, Are there not twelve hours in the day? A man may go about in the day without falling, because he sees the light of this world.

Now Thomas, one of the twelve, named Didymus, was not with them when Jesus came.