“Then the sixth angel sounded his trumpet, and I heard a voice from the four horns of the golden altar before God”
Revelation 9:13 (BSB)
Context Reading
11They were ruled by a king, the angel of the Abyss. His name in Hebrew is Abaddon, and in Greek it is Apollyon. 12The first woe has passed. Behold, two woes are still to follow. 13Then the sixth angel sounded his trumpet, and I heard a voice from the four horns of the golden altar before God 14saying to the sixth angel with the trumpet, “Release the four angels who are bound at the great river Euphrates.” 15So the four angels who had been prepared for this hour and day and month and year were released to kill a third of mankind.