Revelation 9:13

9:13 Then the sixth angel blew his trumpet, and I heard a single voice coming from the horns on the golden altar that is before God,

Revelation 11:1

The Fate of the Two Witnesses

11:1 Then a measuring rod like a staff was given to me, and I was told, “Get up and measure the temple of God, and the altar, and the ones who worship there.

Revelation 16:7

16:7 Then I heard the altar reply, “Yes, Lord God, the All-Powerful, your judgments are true and just!”

Revelation 8:3

8:3 Another angel holding a golden censer came and was stationed at the altar. A large amount of incense was given to him to offer up, with the prayers of all the saints, on the golden altar that is before the throne.