Romans 2:5
But in your obstinacy and impenitence you are storing up wrath for yourself on the Day of Wrath, when the justice of God will burst forth.
Romans 3:5-6
But if our wrongdoing brings out the uprightness of God, what are we to say? Is it wrong in God (I am putting it in ordinary human terms) to inflict punishment?
Romans 9:14
What do we conclude? That God is guilty of injustice? By no means.
Revelation 15:3-4
and they were singing the song of Moses, the slave of God, and the song of the Lamb: "Great and marvelous are your doings, Lord God Almighty! Upright and true are your ways, King of the Ages!
Revelation 16:7
And I heard the altar answer, "Yes, Lord God Almighty! Your sentences are true and just."
Revelation 19:2
for his judgments are sound and upright. For he has passed judgment upon the great idolatress who corrupted the earth with her idolatry, and he has avenged the blood of his slaves upon her!"