Joel 2:1

The Locusts’ Devastation

2:1 Blow the trumpet in Zion;

sound the alarm signal on my holy mountain!

Let all the inhabitants of the land shake with fear,

for the day of the Lord is about to come.

Indeed, it is near!

Numbers 10:3

10:3 When they blow them both, all the community must come to you to the entrance of the tent of meeting.