Numbers 10:4 in the King James Version
And if they blow but with one trumpet, then the princes, which are heads of the thousands of Israel, shall gather themselves unto thee.
Context
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.
5 When you blow an alarm, the camps that lie on the east side shall go forward.