Revelation 7

Before the seventh seal, two groups are protected. First, 144,000 servants of God from the twelve tribes of Israel are sealed on their foreheads for divine protection. Second, John sees an innumerable great multitude from every nation, standing before the throne, clothed in white robes, having come out of the great tribulation. The Elder explains that these are the redeemed who have washed their robes in the blood of the Lamb, and they will serve God in His temple forever.