Numbers 10:6

New King James Version

When you sound the advance the second time, then the camps that lie on the south side shall begin their journey; they shall sound the call for them to begin their journeys.

Cross References

Numbers 10:18

And the standard of the camp of Reuben set out according to their armies; over their army was Elizur the son of Shedeur.

Numbers 10:7

And when the assembly is to be gathered together, you shall blow, but not sound the advance.