Cross reference
Numbers 10:3
3 When they shall blow them, all the congregation shall gather themselves to you at the door of the tent of meeting.
Jeremiah 4:5
5 Declare you in Judah, and publish in Jerusalem; and say, Blow you the trumpet in the land: cry aloud and say, Assemble yourselves, and let us go into the fortified cities.
Joel 2:15-16
15 Blow the trumpet in Zion! Sanctify a fast. Call a solemn assembly.
16 Gather the people. Sanctify the assembly. Assemble the elders. Gather the children, and those who suck the breasts. Let the bridegroom go forth from his room, And the bride out of her chamber.