'Twelve' in the Bible

And all the days of Seth were nine hundred and twelve years; and he died.

Twelve years had they served Chedorlaomer; and in the thirteenth year they rebelled.

And for Ishmael I have heard thee: behold, I will bless him, and will make him fruitful, and will very greatly multiply him; twelve princes shall he beget, and I will make him a great nation.

These are the sons of Ishmael, and these are their names, in their hamlets and their encampments twelve princes of their peoples.

And it came to pass when Israel dwelt in that land, that Reuben went and lay with Bilhah, his father's concubine; and Israel heard of it. And the sons of Jacob were twelve.

And they said, Thy servants were twelve brethren, sons of one man, in the land of Canaan; and behold, the youngest is this day with our father, and one is not.

we are twelve brethren, sons of our father; one is not, and the youngest is this day with our father in the land of Canaan.

All these are the twelve tribes of Israel, and this is what their father spoke to them; and he blessed them: every one according to his blessing he blessed them.