Revelation 1:10
I was in the Spirit on the Lord's day, and heard a great voice behind me, as of a trumpet,
Revelation 4:1
After these things, I saw, and behold, a door opened in heaven: and the first voice which I heard was as of a trumpet speaking to me; and it said, Come up hither, and I will show you what shall be hereafter.
Revelation 14:9-10
And a third angel followed them, saying with a loud voice, If any one worship the beast, and his image, and receive the mark on his forehead, or on his hand,
Treasury of Scripture Knowledge
Summary
Cry aloud, spare not, lift up thy voice like a trumpet, and shew my people their transgression, and the house of Jacob their sins.
Spare
Bible References
Spare
Revelation 14:9
And a third angel followed them, saying with a loud voice, If any one worship the beast, and his image, and receive the mark on his forehead, or on his hand,