'Trumpet' in the Bible

If I can speak with the tongues of men and of angels, but am destitute of Love, I have but become a loud-sounding trumpet or a clanging cymbal.

For if the trumpet give an uncertain sound, who shall prepare himself to the battle?

In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.