Revelation 7:2

Yahweh said to him, “Go through the midst of the city, even through the midst of Jerusalem, and put a mark on the foreheads of the men who sigh and groan over all the abominations which are being done in its midst.”

And Simon Peter answered and said, “You are the Christ, the Son of the living God.”

And another angel came and stood at the altar, having a golden censer; and much incense was given to him, so that he might add it to the prayers of all the saints on the golden altar which was before the throne.

And they were told not to hurt the grass of the earth, nor any green thing, nor any tree, but only the men who do not have the seal of God on their foreheads.

And the sixth angel poured out his bowl on the great river, the Euphrates, and its water was dried up, so that the way would be prepared for the kings from the east.