Numbers 10:5
"When ye blow an alarm, then the camps that lie on the east parts shall go forward."
Cross References (ranked by relevance)
Numbers 10:14
In the first place went the standard of the camp of the children of Judah according to their armies: and over his host was Nahshon the son of Amminadab.
Isaiah 58:1
Cry aloud, spare not, lift up thy voice like a trumpet, and shew my people their transgression, and the house of Jacob their sins.
Joel 2:1
Blow ye the trumpet in Zion, and sound an alarm in my holy mountain: let all the inhabitants of the land tremble: for the day of the LORD cometh, for it is nigh at hand;