'Sound of the Trumpet' in the Bible

I said, "Oh, the feeling in the pit of my stomach! I writhe in anguish. Oh, the pain in my heart! My heart pounds within me. I cannot keep silent. For I hear the sound of the trumpet; the sound of the battle cry pierces my soul!

The Lord said, "I appointed prophets as watchmen to warn you, saying: 'Pay attention to the warning sound of the trumpet!'" But they said, "We will not pay attention!"