7 To gather the assembly, blow the trumpets, but not with the signal for setting out.

Read Numbers 10:7 Using Other Translations

But when the congregation is to be gathered together, ye shall blow, but ye shall not sound an alarm.
But when the assembly is to be gathered together, you shall blow a long blast, but you shall not sound an alarm.
But when you call the people to an assembly, blow the trumpets with a different signal.