4 Bible Verses about Trumpets For Signalling

In the Spirit I found myself present on the day of the Lord, and I heard behind me a loud voice which resembled the blast of a trumpet.

After all this I looked and saw a door in Heaven standing open, and the voice that I had previously heard, which resembled the blast of a trumpet, again spoke to me and said, "Come up here, and I will show you things which are to happen in the future."

When you give in charity, never blow a trumpet before you as the hypocrites do in the synagogues and streets in order that their praises may be sung by men. I solemnly tell you that they already have their reward.

a sound of such a kind that those who heard it entreated that no more should be added.