Charles Ellicott Commentary Nehemiah 9:13

"Thou camest down also upon mount Sinai, and spakest with them from heaven, and gavest them right ordinances and true laws, good statutes and commandments," — Nehemiah 9:13 (ASV)

Right judgements. —Five of the names given to the law of God in Psalm 119 are singled out and applied to the Sinaitic legislation first, and then to the subsequent ordinances of Moses generally. But the emphasis here is on the adjectives “right,” “true,” “good,” as belonging rather to the eternal principles of the Decalogue.