Isaiah 18:3; Isaiah 27:13; Isaiah 58:1

Isaiah 18:3

3 All you inhabitants of the world and dwellers on earth, As soon as a standard is raised on the mountains, you will see it, And as soon as the trumpet is blown, you will hear it.

Isaiah 27:13

13 It will come about also in that day that a great trumpet will be blown, and those who were perishing in the land of Assyria and who were scattered in the land of Egypt will come and worship the LORD in the holy mountain at Jerusalem.

Isaiah 58:1

1 "Cry loudly, do not hold back; Raise your voice like a trumpet, And declare to My people their transgression And to the house of Jacob their sins.