'Twelve' in the Bible

The covered way was twenty cubits long and twelve cubits wide, and they went up to it by ten steps; and there were pillars by the uprights, one on one side and one on the other.

And the fireplace is twelve cubits long and twelve cubits wide, square on its four sides.

This is what the Lord has said: These are the limits by which you will take up your heritage in the land among the twelve tribes of Israel: Joseph is to have two parts.