Numbers 10:7

But when the congregation is to be convened, ye shall blow, but ye shall not sound an alarm.

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;

Numbers 10:3-4

And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.

Treasury of Scripture Knowledge

Summary

But when the congregation is to be gathered together, ye shall blow, but ye shall not sound an alarm.

Ye shall blow

Sound

Bible References

Ye shall blow

Numbers 10:3
And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.

Sound

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;