Numbers 10:7

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

Joel 2:1

Blow the trumpet in Zion, and sound an alarm in my holy mountain! Let all the inhabitants of the land tremble, for the day of Yahweh comes, for it is close at hand:

Numbers 10:3-4

When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting.

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
When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting.

Sound

Joel 2:1
Blow the trumpet in Zion, and sound an alarm in my holy mountain! Let all the inhabitants of the land tremble, for the day of Yahweh comes, for it is close at hand: