Revelation 7:2

And I saw another angel ascending from the rising sun, having the seal of the living God: and he cried with a great voice to the four angels to whom power was given to injure the earth, and the sea;

Revelation 9:4

And it was said to them that they should not injure the grass of the earth, nor any green thing, nor any tree; but the men who had not the seal of God in their foreheads.

Treasury of Scripture Knowledge

Summary

And I subscribed the evidence, and sealed it, and took witnesses, and weighed him the money in the balances.

Bible References

And sealed

Revelation 7:2
And I saw another angel ascending from the rising sun, having the seal of the living God: and he cried with a great voice to the four angels to whom power was given to injure the earth, and the sea;
Revelation 9:4
And it was said to them that they should not injure the grass of the earth, nor any green thing, nor any tree; but the men who had not the seal of God in their foreheads.