2 Thessalonians 1:6
since it is a righteous thing with God to recompense tribulation to those who cause you tribulation;
Matthew 7:2
for with what judgment ye judge, ye shall be judged; and with what measure ye mete, it shall be measured to you.
James 2:13
For the judgment is without mercy to him who showed no mercy: mercy exults over judgment.
Revelation 13:10
If anyone is for captivity, into captivity he goes; if anyone shall kill with a sword, with a sword he must be killed. Here is the patience and the faith of the saints.
Revelation 16:6
because they poured out the blood of saints and of prophets, and Thou hast given them blood to drink: they are worthy!"
Revelation 19:2
because true and righteous are His judgments; because He judged the great harlot; who, indeed, corrupted the earth with her fornication, and He avenged the blood of His servants at her hand."