Revelation 16:7

and I heard another from the altar say, "oh! Lord God almighty, true and just are thy judgments."

Revelation 6:9

When he had opened the fifth seal, I saw under the altar the souls of those that were slain for the word of God, and for the testimony which they maintain'd.

Revelation 19:2

for just and right are his judgments; for he hath condemned the grand prostitute, who corrupted the earth with her licentiousness, and hath avenged the blood of his servants that were shed by her hand."

Revelation 14:18

he also having a sharp sickle. and another angel came out from the altar, who presided over the fire; and cried with a loud cry to him that had the sharp sickle, "stretch out thy sharp sickle, and gather the clusters of the vine of the earth; for her grapes are full ripe."

Revelation 14:18

he also having a sharp sickle. and another angel came out from the altar, who presided over the fire; and cried with a loud cry to him that had the sharp sickle, "stretch out thy sharp sickle, and gather the clusters of the vine of the earth; for her grapes are full ripe."

Revelation 14:18

he also having a sharp sickle. and another angel came out from the altar, who presided over the fire; and cried with a loud cry to him that had the sharp sickle, "stretch out thy sharp sickle, and gather the clusters of the vine of the earth; for her grapes are full ripe."

Revelation 14:18

he also having a sharp sickle. and another angel came out from the altar, who presided over the fire; and cried with a loud cry to him that had the sharp sickle, "stretch out thy sharp sickle, and gather the clusters of the vine of the earth; for her grapes are full ripe."

Revelation 8:3-5

and another angel came and stood at the altar, having a golden censer; and there was given to him much incense, that he should offer it with the prayers of all the saints upon the golden altar, which was before the throne.

Revelation 13:10

he hath leadeth into captivity, shall be led into captivity: he that killeth with the sword, shall perish by the sword. here is the patience and the faith of the saints.

Revelation 14:10

he shall drink of the wine of the divine vengeance, the strongest wine that can be poured out of the cup of his indignation; He 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 sung the song of Moses, the servant of God, and the song of the lamb, saying, "great and marvellous are thy works, Lord God almighty; just and true are thy ways, thou king of ages.

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
When he had opened the fifth seal, I saw under the altar the souls of those that were slain for the word of God, and for the testimony which they maintain'd.
Revelation 8:3
and another angel came and stood at the altar, having a golden censer; and there was given to him much incense, that he should offer it with the prayers of all the saints upon the golden altar, which was before the throne.
Revelation 14:18
he also having a sharp sickle. and another angel came out from the altar, who presided over the fire; and cried with a loud cry to him that had the sharp sickle, "stretch out thy sharp sickle, and gather the clusters of the vine of the earth; for her grapes are full ripe."

Even

Revelation 15:3
and they sung the song of Moses, the servant of God, and the song of the lamb, saying, "great and marvellous are thy works, Lord God almighty; just and true are thy ways, thou king of ages.

True

Revelation 13:10
he hath leadeth into captivity, shall be led into captivity: he that killeth with the sword, shall perish by the sword. here is the patience and the faith of the saints.
Revelation 14:10
he shall drink of the wine of the divine vengeance, the strongest wine that can be poured out of the cup of his indignation; He 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 just and right are his judgments; for he hath condemned the grand prostitute, who corrupted the earth with her licentiousness, and hath avenged the blood of his servants that were shed by her hand."