Hisgalus 7:4-8

And I heard the mispar (number) of the ones having been sealed, 144,000, having been marked with the chotam (seal) from kol shivtei Bnei Yisroel (every tribe of the Sons of Israel), Of the shevet of Yehudah, 12,000 having been sealed; of the shevet of Reuven, 12,000, of the shevet of Gad, 12,000, Of the shevet of Asher, 12,000, of the shevet of Naphtali, 12,000, of the shevet of Menasheh, 12,000, Of the shevet of Shim'on, 12,000, of the shevet of Levi, 12,000, of the shevet of Yissa'khar, 12,000, Of the shevet of Zevulun, 12,000, of the shevet of Yosef, 12,000, of the shevet of Binyamin, 12,000.