John Wesley on Numbers 27:17

Go out before them - That is, who may wisely conduct them in all their affairs, both when they go forth to war, or upon other occasions, and when they return home and live in peace. A metaphor from shepherds, who in those places used not to go behind their sheep, as ours now do, but before them, and to lead them forth to their pasture, and in due time to lead them home again.