4 Bible Verses about Trumpets For Signalling

Here I was in the Spirit on the Lord's-day: and heard behind me a loud voice, as of a trumpet,

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 shew thee things which must come to pass hereafter.

Therefore when thou dost an alms-deed, do not proclaim it abroad, as the hypocrites do, in the synagogues, and in the streets, that they may be applauded by men. Verily I tell you, they have their reward.

and the sound of a trumpet, and the voice of words, which they that heard, intreated that the word might not any more be thus delivered to them: