Joshua 6:8
And it came to pass, when Joshua had spoken to the people, that the seven priests bearing the seven trumpets of rams' horns passed on before the LORD, and blew with the trumpets: and the ark of the covenant of the LORD followed them.
Torrey's Topical Textbook—AKJV

1 Corinthians 14:8
For if the trumpet give an uncertain sound, who shall prepare himself to the battle?
Torrey's Topical Textbook—AKJV