'Twelve' in the Bible

So they gathered them up, and filled twelve baskets with broken pieces from the five barley loaves, which remained over unto them that had eaten.

Jesus said therefore unto the twelve, Would ye also go away?

Jesus answered them, Did not I choose you the twelve, and one of you is a devil?

Now he spake of Judas the son of Simon Iscariot, for he it was that should betray him, being one of the twelve.

Jesus answered, Are there not twelve hours in the day? If a man walk in the day, he stumbleth not, because he seeth the light of this world.

But Thomas, one of the twelve, called Didymus, was not with them when Jesus came.