Revelation 7:2-4 NIV

[2] Then I saw another angel coming up from the east, having the seal of the living God. He called out in a loud voice to the four angels who had been given power to harm the land and the sea: [3] “Do not harm the land or the sea or the trees until we put a seal on the foreheads of the servants of our God.” [4] Then I heard the number of those who were sealed: 144,000 from all the tribes of Israel.