Hearken now unto my voice, I will give thee counsel
Jethro being the elder man, and of some character and figure, being either a priest or prince of Midian, or both, might, without incurring a censure, take upon him to give advice to Moses, a younger man, and his son-in-law, though he was superior to him in office and in parts; and especially since his advice proceeded from a sincere and cordial regard for his health and welfare:
and God shall be with thee:
and succeed the advice he gave, which he persuaded himself would be agreeable to the will of God, and attending to it he would prosper, and find that the method taken would be blessed of God, and issue in his own good and the good of the people; or it may be taken prayerwise, as by some, "may God be with thee" F19; to direct thee to what thou shouldest do, either to take the advice, or reject it; and be it as it will, he wished him well, and that he might have his health, and that as his day was, his strength might be:
be thou for the people to God-ward;
or on the part of God, as Aben Ezra interprets it; that part of his work he advised him to retain by all means, which lay more immediately between God and the people; to be a mediator between them; to transact affairs for them with God; to inquire his mind and will in matters difficult and doubtful; to be, as Jarchi expresses it, a messenger and interpreter between them, and an inquirer of judgments of him, or what statutes and judgments he would have observed by them: that thou mayest bring the causes unto God; concerning which, as yet, he had given no directions as a rule to go by.
The Brenton translation of the Septuagint is in the public domain.