John Gill Commentary Exodus 18:20

"and thou shalt teach them the statutes and the laws, and shalt show them the way wherein they must walk, and the work that they must do." — Exodus 18:20 (ASV)

And thou shalt teach them ordinances and laws
Both with respect to things civil and religious, which he should receive from God:

and shalt show them the way wherein they must walk ;
the path of faith and duty, the way of truth, holiness, and righteousness:

and the work that they must do ;
both with respect to God, and one another, the various duties and exercises of religion, everything relating to their moral, religious, and civil conduct.