Charles Ellicott Commentary Deuteronomy 6:20

"When thy son asketh thee in time to come, saying, What mean the testimonies, and the statutes, and the ordinances, which Jehovah our God hath commanded you?" — Deuteronomy 6:20 (ASV)

What mean the testimonies, and the statutes, and the judgments. — These three words appear for the first time together in the introduction to this discourse (Deuteronomy 4:45). The Law, or Torah, includes charges, and institutions, and requirements. The Decalogue itself is primarily the Torah; the charge which follows may come under the category of “testimony.” The “statutes” and “judgments” more properly describe the contents of the chapters from Deuteronomy 11-26 inclusive.