And the City had a great high wall with 12 gates and written on the gates were the names of the 12 tribes of Israel, and 12 angels sat at the gates.

(Revelation 21:12)

And I heard the number of them which were sealed; and they were sealed 144,000 of the all the tribes of the children of Israel.

Of the tribe of Judah were sealed 12,000.

Of the tribe of the tribe of Reuben were sealed 12,000.

Of the tribe of Gad were sealed 12,000.

Of the tribe Asher  were sealed 12,000.

Of the tribe of Nephatali were sealed 12,000.

Of the tribe of Manassah were sealed 12,000.

Of the tribe of Simeon were sealed 12,000.

Of the tribe of Levi were sealed 12,000.

Of the tribe of Issachar were sealed 12,000.

Of the tribe of Zebulon were sealed 12,000.

Of the tribe of Joseph were sealed 12,000.

Of the tribe of Benjamin were sealed 12,000.

After this, i beheld, and lo, a great multitude, which no man could number, of all nations and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands.

(Revelation 7:3-9)