Numbers 10:7-8

10:7 But when you assemble the community, ¹  you must blow, but you must not sound an alarm. ²  10:8 The sons of Aaron, the priests, must blow the trumpets; and they will be to you for an eternal ordinance throughout your generations.

[10:7]  ¹ tn There is no expressed subject in the initial temporal clause. It simply says, “and in the assembling the assembly.” But since the next verb is the second person of the verb, that may be taken as the intended subject here.

[10:7]  ² sn The signal for moving camp was apparently different in tone and may have been sharper notes or a different sequence. It was in some way distinguishable.