Ezekiel 9:2-4

2And, behold, six men came from the way of the higher gate, which lieth toward the north, and every man a slaughter weapon in his hand; and one man among them was clothed with linen, with a writer’s inkhorn by his side: and they went in, and stood beside the brasen altar.123 3And the glory of the God of Israel had gone up from the cherub, on which he was, to the threshold of the house. And he called to the man clothed with linen, who had the writer’s inkhorn by his side; 4And the LORD said to him, Go through the midst of the city, through the midst of Jerusalem, and set a mark upon the foreheads of the men that sigh and that cry for all the abominations that are done in the midst of it.4