Ezekiel 9:4-5

And Jehovah said unto 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 over all the abominations that are done in the midst thereof. And to the others he said in my hearing, Go ye through the city after him, and smite: let not your eye spare, neither have ye pity