Moses
Numbers 10:4BSB·traditional attribution

But if only one is sounded, then the leaders, the heads of the clans of Israel, are to gather before you.

Matthew Henry Presbyterian @wholebiblehenry

We have here directions concerning the public notices that were to be given to the people upon several occasions by sound of trumpet. In a thing of this nature, one would think, Moses needed not to have been taught of God: his own reason might teach him the conveniency of trumpets; but the constitution of Israel was to be in every thing divine, and therefore...

Commenting on Numbers 10:1-10

John Gill Reformed Baptist @doctorgill

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...

Keil & Delitzsch Lutheran @keilanddelitzsch

Num 10:1-4 The Silver Signal-Trumpets. - Although God Himself appointed the time for removal and encampment by the movement of the cloud of His presence, signals were also requisite for ordering and conducting the march of so numerous a body, by means of which Moses, as commander-in-chief, might make known his commands to the different divisions of the camp.

Commenting on Numbers 10:1-4