'Twelve' in the Bible

Therefore they gathered them together, and filled twelve baskets with the fragments of the five barley loaves, which remained over and above unto them that had eaten.

Then said Jesus unto the twelve, Will ye also go away?

Jesus answered them, Have not I chosen you twelve, and one of you is a devil?

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

Jesus answered, Are there not twelve hours in the day? If any 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.