Ezekiel 33:4-5
4 then if anyone hears the trumpet but does not heed the warning and the sword comes and takes their life, their blood will be on their own head. 5 Since they heard the sound of the trumpet but did not heed the warning, their blood will be on their own head. If they had heeded the warning, they would have saved themselves.
Joel 2:1
2 Blow the trumpet in Zion; sound the alarm on my holy hill. Let all who live in the land tremble,
for the day of the Lord is coming. It is close at hand—
https://www.youtube.com/watch?v=-dIG3sWhyuc
https://www.youtube.com/watch?v=HssfmdUViVE
Acts 2:19 I will perform miracles in the sky above and signs on the earth below — blood, fire and thick smoke.
Revelation 14:7
7 He said in a loud voice, “Fear God and give him glory, because the hour of his judgment has come. Worship him who made the heavens, the earth, the sea and the springs of water.”
https://www.youtube.com/watch?v=2kjiu7SdcqE
https://www.youtube.com/watch?v=41U3c-mQ3So
Exodus 19:16
On the morning of the third day there was thunder and lightning, with a thick cloud over the mountain, and a very loud trumpet blast. Everyone in the camp trembled.
Amos 3:6
When a trumpet sounds in a city, do not the people tremble? When disaster comes to a city, has not the Lord caused it
https://www.youtube.com/watch?v=-cn9dmq62Fk
https://www.youtube.com/watch?v=bhKhPawcD6s
https://www.youtube.com/watch?v=tv0zm_IXpQw
http://en.wikipedia.org/wiki/Shofar
