Revelation 7:6

Overview - Revelation 7
1	An angel seals the servants of God in their foreheads.
4	The number of them that were sealed: of the tribes of Israel a certain number.
9	Of all the other nations an innumerable multitude, which stand before the throne, clad in white robes, and palms in their hands.
14	Their robes were washed in the blood of the Lamb.

Revelation 7:6  (King James Version)
Of the tribe of Aser were sealed twelve thousand. Of the tribe of Nepthalim were sealed twelve thousand. Of the tribe of Manasses were sealed twelve thousand.