Ezekiel 9:1-6

1 Then I heard God shout, "Come here, you men who are going to punish the city. Bring your weapons with you."
2 At once six men came from the outer north gate of the Temple, each one carrying a weapon. With them was a man dressed in linen clothes, carrying something to write with. They all came and stood by the bronze altar.
3 Then the dazzling light of the presence of the God of Israel rose up from the winged creatures where it had been, and moved to the entrance of the Temple. The Lord called to the man dressed in linen,
4 "Go through the whole city of Jerusalem and put a mark on the forehead of everyone who is distressed and troubled because of all the disgusting things being done in the city." 1
5 And I heard God say to the other men, "Follow him through the city and kill. Spare no one; have mercy on no one.
6 Kill the old men, young men, young women, mothers, and children. But don't touch anyone who has the mark on his forehead. Start here at my Temple." So they began with the leaders who were standing there at the Temple.