Numbers 10:7

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

Joel 2:1

Blow the shofar in Zion, and sound an alarm in my holy mountain; let all the inhabitants of the earth tremble for the day of the LORD comes, for it is near at hand;

Numbers 10:3-4

And when they shall blow them, all the congregation shall join themselves to thee at the door of the tabernacle of the testimony.

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 them, all the congregation shall join themselves to thee at the door of the tabernacle of the testimony.

Sound

Joel 2:1
Blow the shofar in Zion, and sound an alarm in my holy mountain; let all the inhabitants of the earth tremble for the day of the LORD comes, for it is near at hand;