'Twelve' in the Bible

And he made with him the agreement of which circumcision was the sign. And so Abraham had a son, Isaac, and gave him circumcision on the eighth day; and Isaac had a son, Jacob, and Jacob was the father of the twelve heads of the families of Israel.

And there were about twelve of these men.

Seeing that you are able to make certain of the fact that it is not more than twelve days from the time when I came up to Jerusalem for worship;

For the effecting of which our twelve tribes have been working and waiting night and day with all their hearts. And in connection with this hope I am attacked by the Jews, O king!