'Twelve' in the Bible

And they came to Elim where there were twelve water-springs and seventy palm-trees: and they put up their tents there by the waters.

Then Moses put down in writing all the words of the Lord, and he got up early in the morning and made an altar at the foot of the mountain, with twelve pillars for the twelve tribes of Israel.

The jewels are to be twelve in number, for the names of the children of Israel; every jewel having the name of one of the twelve tribes cut on it as on a stamp.

There were twelve stones for the twelve tribes of Israel; on every one the name of one of the tribes of Israel was cut, like the cutting of a stamp.