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.
Related Commentaries of Numbers 27:17
Numbers 27:17
17 Which may go out before them, and which may go in before them, and which may lead them out, and which may bring them in; that the congregation of the LORD be not as sheep which have no shepherd.