If thou shalt do this thing, and God command thee, &c.— The humility of Jethro is as apparent as his wisdom. He was not so vain as to think that Moses should follow his counsel without the immediate approbation of GOD; and therefore he says, if GOD shall command thee to do what I advise, and approve that counsel which I have given, then mayest thou safely follow it, and reap the advantages of it. So that though Jethro gave the advice, Moses followed it not without the immediate consent of God; and we do not see what possible objection can lie against Moses for receiving from wise and good men hints for improvement in legislation, while he put not those hints in execution without the approbation of the Sovereign Lawgiver.
Related Commentaries of Exodus 18:23
Exodus 18:23
23 If thou shalt do this thing, and God command thee so, then thou shalt be able to endure, and all this people shall also go to their place in peace.