'Twelve' in the Bible

‘Return, O faithless children [of the twelve tribes],’ says the Lord,‘For I am a master and husband to you,And I will take you [not as a nation, but individually]—one from a city and two from a [tribal] family—And I will bring you to Zion.’

The two pillars, the one [enormous] Sea (basin), and the twelve bronze bulls under the Sea, and the stands, which King Solomon had made for the house of the Lord—the bronze of all these things was beyond weighing.

Concerning the pillars, the height of each pillar was eighteen cubits (twenty-seven feet), and a line [an ornamental molding] of twelve cubits (eighteen feet) went around its circumference; it was four fingers thick, and [the pillar was] hollow.