Numbers 10:7

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

Joel 2:1

Blow a ram's horn in Zion, and sound an alarm in My holy mountain; let all the inhabitants of the land tremble. For the day of Jehovah comes, for it is near at hand;

Numbers 10:3-4

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

Sound

Joel 2:1
Blow a ram's horn in Zion, and sound an alarm in My holy mountain; let all the inhabitants of the land tremble. For the day of Jehovah comes, for it is near at hand;