Numbers 10:3 in the King James Version
And when they shall blow with them, all the assembly shall assemble themselves to thee at the door of the tabernacle of the congregation.
Context
2 “Make two trumpets of silver. You shall make them of beaten work. You shall use them for the calling of the congregation and for the journeying of the camps.
3 When they blow them, all the congregation shall gather themselves to you at the door of the Tent of Meeting.
4 If they blow just one, then the princes, the heads of the thousands of Israel, shall gather themselves to you.