Numbers 10:4

4 And if with one they blow, then have the princes, heads of the thousands of Israel, met together unto thee;

Numbers 10:4 Meaning and Commentary

Numbers 10:4

And if they blow [but] with one [trumpet]
With only one of them, or but once, with one sounding, and that an even one as before:

then the princes, [which are] the heads of the thousands of Israel,
shall gather themselves unto thee:
and they only or alone, as Aben Ezra: by this token, or by this difference of blowing both trumpets, or only one, it was, easily known when the whole congregation or when the princes only were to meet Moses at the same place, the door of the tabernacle of the congregation; and all are to attend divine service, and the ministry of the word, even the whole church of God, and all the members of it, high and low, rich and poor, princes and people.

Numbers 10:4 In-Context

2 `Make to thee two trumpets of silver; beaten work thou dost make them, and they have been to thee for the convocation of the company, and for the journeying of the camps;
3 and they have blown with them, and all the company have met together unto thee, unto the opening of the tent of meeting.
4 And if with one they blow, then have the princes, heads of the thousands of Israel, met together unto thee;
5 `And ye have blown -- a shout, and the camps which are encamping eastward have journeyed.
6 `And ye have blown -- a second shout, and the camps which are encamping southward have journeyed; a shout they blow for their journeys.
Young's Literal Translation is in the public domain.