Revelation 16:7

And I heard another from the altar, saying, Yea, Lord God Almighty; true and righteous are thy judgments.

Revelation 6:9

And when he opened the fifth seal, I saw under the altar the souls of them that had been slain for the word of God, and for the testimony which they held.

Revelation 19:2

For true and righteous are his judgments: for he hath judged the great whore, who corrupted the earth with her fornication, and hath avenged the blood of his servants at her hand,

Revelation 14:18

And another angel from the altar, who had power over fire, cried with a loud cry to him that had the sharp sickle, saying, Thrust in thy sickle and gather the clusters of the vine of the earth; for her grapes are fully ripe.

Revelation 8:3-5

And another angel came and stood at the altar, having a golden censer, and much incense was given him, that he might place it with the prayers of all the saints upon the golden altar which is before the throne.

Revelation 13:10

If any leadeth into captivity, he goeth into captivity: if any man kill with the sword, he must be killed with the sword. Here is the patience and the faithfulness of the saints.

Revelation 14:10

He shall also drink of the wine of the wrath of God, which is poured unmixt into the cup of his indignation, and shall be tormented with fire and brimstone, in the presence of the holy angels, and in the presence of the Lamb.

Revelation 15:3-4

And they sing the song of Moses, the servant of God, and the song of the Lamb, saying, Great and wonderful are thy works, Lord God Almighty; just and true are thy ways, O King of the nations?

Treasury of Scripture Knowledge

Summary

And I heard another out of the altar say, Even so, Lord God Almighty, true and righteous are thy judgments.

Bible References

Out

Revelation 6:9
And when he opened the fifth seal, I saw under the altar the souls of them that had been slain for the word of God, and for the testimony which they held.
Revelation 8:3
And another angel came and stood at the altar, having a golden censer, and much incense was given him, that he might place it with the prayers of all the saints upon the golden altar which is before the throne.
Revelation 14:18
And another angel from the altar, who had power over fire, cried with a loud cry to him that had the sharp sickle, saying, Thrust in thy sickle and gather the clusters of the vine of the earth; for her grapes are fully ripe.

Even

Revelation 15:3
And they sing the song of Moses, the servant of God, and the song of the Lamb, saying, Great and wonderful are thy works, Lord God Almighty; just and true are thy ways, O King of the nations?

True

Revelation 13:10
If any leadeth into captivity, he goeth into captivity: if any man kill with the sword, he must be killed with the sword. Here is the patience and the faithfulness of the saints.
Revelation 14:10
He shall also drink of the wine of the wrath of God, which is poured unmixt into the cup of his indignation, and shall be tormented with fire and brimstone, in the presence of the holy angels, and in the presence of the Lamb.
Revelation 19:2
For true and righteous are his judgments: for he hath judged the great whore, who corrupted the earth with her fornication, and hath avenged the blood of his servants at her hand,