2 Thessalonians 1:6
if indeed it is a righteous thing with God to recompense tribulation to them who are troubling you,
Matthew 7:2
For with what criticism you criticise, you will be criticised: and with what measure you measure, it will be measured unto you.
James 2:13
For judgment is without mercy to him that shows no mercy; but mercy glorieth against judgment.
Revelation 13:10
If any one leads into captivity he goes into captivity: if any one kills with a sword, it behooves him to be killed with a sword. Here is the patience and the faith of the saints.
Revelation 16:6
because they shed the blood of saints and of prophets, and thou hast given them blood to drink; they are worthy.
Revelation 19:2
because his judgments are true and righteous; because he has judged the great harlot, who corrupted the earth by her fornication, and he has avenged the blood of his servants from her hand.